Passage

Exodus 24.6-8

Book: Exodus · NASB95

Verse

"Moses took half of the blood and put it in basins, and the other half of the blood he sprinkled on the altar. Then he took the book of the covenant and read it in the hearing of the people; and they said, 'All that the LORD has spoken we will do, and we will be obedient!' So Moses took the blood and sprinkled it on the people, and said, 'Behold the blood of the covenant, which the LORD has made with you in accordance with all these words.'" (Exodus 24:6-8, NASB95)

Immediate context (±2 verses)

NASB95 (NASB95)

"4. Moses wrote down all the words of the LORD. Then he arose early in the morning, and built an altar at the foot of the mountain with twelve pillars for the twelve tribes of Israel. 5. He sent young men of the sons of Israel, and they offered burnt offerings and sacrificed young bulls as peace offerings to the LORD."

"6. Moses took half of the blood and put it in basins, and the other half of the blood he sprinkled on the altar. 7. Then he took the book of the covenant and read it in the hearing of the people; and they said, 'All that the LORD has spoken we will do, and we will be obedient!' 8. So Moses took the blood and sprinkled it on the people, and said, 'Behold the blood of the covenant, which the LORD has made with you in accordance with all these words.'"

"9. Then Moses went up with Aaron, Nadab and Abihu, and seventy of the elders of Israel, 10. and they saw the God of Israel; and under His feet there appeared to be a pavement of sapphire, as clear as the sky itself." (Exodus 24:4-10, NASB95)

Setting

Speaker: the narrator (traditionally Moses) recounts the ratification ceremony; Moses himself speaks the declaratory words ("Behold the blood of the covenant…").
Audience: the assembled tribes of Israel at the foot of Sinai; canonically, every later reader who would understand what covenant and blood mean in the biblical economy.
Location: the foot of Mount Sinai. An altar with twelve pillars (one per tribe) is built; the elders ascend partway up the mountain after the ratification.
Time period: during the wilderness period, after the giving of the Decalogue (Exodus 20) and the Book of the Covenant (Exodus 21-23), and before Moses' 40-day ascent to receive the tabernacle instructions (Exodus 24:18, 31:18). 13th c. BC by traditional dating.

Theological reading

This is the constitutive ratification of the Sinai (Mosaic) Covenant. The structure of the ceremony is the structure of every covenant in Scripture, and the explicit mention of blood, sprinkled on both altar and people, with the explanatory formula "behold the blood of the covenant", establishes the categorical link between covenant and sacrificial blood that will run forward through Leviticus, the prophets, the Last Supper, and Hebrews.

Five theological moves:

Covenant requires blood. The covenant is not ratified by signature, oath, or declaration alone. Bulls are slaughtered as burnt offerings and peace offerings; their blood is divided; half goes on God's altar, half on the people. The covenant is enacted in blood. Hebrews makes this explicit by direct quotation: "Hence even the first covenant was not inaugurated without blood" (Hebrews 9:18). The principle is older than Sinai (cf. Genesis 15, where God passes between divided animals to ratify the Abrahamic covenant) but is named here for the first time as "the blood of the covenant."
Bilateral sprinkling. The blood is divided between altar and people. The altar represents God's side of the covenant (the divine party); the people are the human party. The shared blood symbolizes that both parties are now bound by the covenant, and that covenant violation (by either side, though only one side is capable of violating it) carries blood-cost. The peoples' double affirmation ("All that the LORD has spoken we will do, and we will be obedient", na'aseh v'nishma) is a binding self-imprecation: if we fail this oath, let the blood-judgment fall.
The declaratory formula. "Behold the blood of the covenant, which the LORD has made with you" (hineh dam ha-berit asher karat YHWH immakem). This is the formal pronouncement of ratification. The Hebrew idiom karat berit ("cut a covenant") preserves the sacrificial origin of all covenant-language. To make a covenant is, etymologically, to cut, to slaughter the ratifying victim.
Theophanic confirmation. Immediately after the ratification, Moses, Aaron, Nadab, Abihu, and seventy elders ascend and "saw the God of Israel", a covenant meal in God's presence (vv. 9-11). The covenant is not only ratified by blood but celebrated in fellowship with God, prefiguring the Eucharistic-meal structure of the New Covenant.
Typological forward-link to the Last Supper. When Jesus, at the Last Supper, says "this is My blood of the covenant, which is poured out for many for forgiveness of sins" (Matthew 26:28; cf. Mark 14:24, Luke 22:20, 1 Corinthians 11:25), He is quoting Exodus 24:8, and replacing the bull's blood with His own. Luke's variant, "this cup which is poured out for you is the new covenant in My blood", adds the Jeremianic new covenant overlay (Jeremiah 31:31). The typology is unmistakable: Jesus is the new Moses inaugurating a new covenant, but with His own blood as the ratifying victim.

Why the bilateral sprinkling matters for atonement. The blood sprinkled on the altar accomplishes propitiation (Godward, cf. Leviticus 17:11, "I have given it to you on the altar to make atonement for your souls; for it is the blood by reason of the life that makes atonement"). The blood sprinkled on the people accomplishes consecration / covenant-incorporation (manward, bringing them under the covenant). Both motions, propitiation and incorporation, are picked up in the New Covenant: Christ's blood propitiates God's wrath (Romans 3:25, hilastērion) and consecrates believers as the covenant people (Hebrews 10:29, "the blood of the covenant by which he was sanctified").

The chronic problem of the Sinai covenant. Exodus 24 ratifies a covenant that the people will violate within forty days (the golden calf, Exodus 32). The book of Hebrews (8-10) returns to this episode to argue that the Sinai covenant, inaugurated in blood, but in the blood of bulls, with priests who die, with sacrifices that must be repeated, was always pointing forward to a better covenant ratified by better blood (Christ's), mediated by a better priest (the Melchizedekian high priest), and producing internal obedience (the Spirit-written law of Jeremiah 31). The bilateral sprinkling at Sinai foreshadows the bilateral effect of the cross: blood that satisfies God and incorporates the people.

Patristic / scholarly note

Patristic. Cyril of Alexandria (Glaphyra on Exodus, c. AD 430) reads the divided blood typologically: half on the altar = the propitiatory dimension, half on the people = the sanctifying dimension, both fulfilled in Christ's single sacrifice. John Chrysostom (Homilies on Hebrews 16) makes the Last-Supper link explicit: "When you hear of 'blood of the covenant,' do not think of bulls, Christ Himself has supplied the antitype." Augustine (Reply to Faustus the Manichaean 19.16) treats the Sinai blood-rite as a sacramental sign that prefigures the Eucharist.

Reformation. Calvin (Commentary on the Last Four Books of Moses, 1564) treats Exodus 24 as the central type of the New Covenant ratification: "What is here said of the blood is properly transferred to the death of Christ, by which the new covenant is sealed." The Heidelberg Catechism (Q. 79) and the Westminster Larger Catechism (Q. 169) both ground the meaning of the Eucharistic cup in the Exodus 24 / Last-Supper typology. Luther (Lectures on Galatians, on 3:15) appeals to Sinai's blood-ratification to argue that covenants, once enacted by blood, cannot be amended, and so the Mosaic law cannot be added back onto the gospel.

Modern conservative scholarship. Brevard Childs (The Book of Exodus OTL, 1974) treats the chapter as the structural climax of the Sinai pericope. Douglas Stuart (Exodus NAC, 2006) and T. Desmond Alexander (Exodus AOTC, 2017) develop the covenant-ratification reading. John Currid (Exodus EP Study Commentary, 2000) emphasizes the bilateral-sprinkling typology. On the Hebrews-side, William Lane (Hebrews WBC, 1991) and Peter O'Brien (Hebrews PNTC, 2010) trace the Hebrews 9 argument back to Exodus 24 in detail. On the Last-Supper link, Joachim Jeremias (The Eucharistic Words of Jesus, 1966) remains the standard treatment; more recently, Brant Pitre (Jesus and the Last Supper, 2015) develops the Sinai-typology of the Lord's Supper at length.

Connection to other passages

Genesis 15:9-17, the Abrahamic covenant ratified by passing-between divided animals; the prior blood-covenant template
Leviticus 17:11, "the life of the flesh is in the blood…I have given it to you on the altar to make atonement"; the theological grammar of Exodus 24
Jeremiah 31.31-34, the prophesied New Covenant, contrasted with the Sinai covenant by internalization
Zechariah 9:11, "as for you also, because of the blood of My covenant with you, I have set your prisoners free from the waterless pit"; later prophetic appeal to Exodus 24 language
Matthew 26:28 / Mark 14:24, "this is My blood of the covenant"; Jesus quoting Exodus 24:8 directly at the Last Supper
Luke 22:20 / 1 Corinthians 11:25, "the new covenant in My blood"; the new-covenant overlay
Hebrews 9:18-22, explicit citation of Exodus 24:8 ("This is the blood of the covenant which God commanded you") to argue that "without shedding of blood there is no forgiveness"
Hebrews 10:29, "the blood of the covenant by which he was sanctified"
Hebrews 13:20, "the blood of the eternal covenant"
1 Peter 1:2, "sprinkling of the blood of Jesus Christ"; the Exodus-24 idiom applied to Christian initiation
Genesis 14.18-20, Melchizedek's priestly blessing of Abraham; the pre-Levitical priestly background

Key words

H1818 - dam, dam (blood), the ratifying substance
H1285 - berit (pending), berit (covenant), the binding agreement
H3772 - karat (pending), karat (cut), the verb "cut a covenant," preserving the sacrificial origin
H2236 - zaraq (pending), zaraq (sprinkle / dash), the cultic motion of the blood-rite
H4196 - mizbeach (pending), mizbeach (altar), the locus of the Godward sprinkling
H8085 - shama (pending), shama (hear / obey), the second half of na'aseh v'nishma ("we will do, and we will be obedient")