Exodus 24:7 WEB

⁵  He sent young men of the children of Israel, who offered burnt offerings and sacrificed peace-offerings of oxen to Yahweh.

⁶  Moses took half of the blood and put it in basins, and half of the blood he sprinkled on the altar.

⁷  He took the book of the covenant and read it in the hearing of the people, and they said, 'All that Yahweh has spoken will we do, and be obedient.'

⁸  Moses took the blood, and sprinkled it on the people, and said, 'Look, this is the blood of the covenant, which Yahweh has made with you concerning all these words.'

⁹  Then Moses, Aaron, Nadab, Abihu, and seventy of the elders of Israel went up.