Exodus 24:7-9

Young's Literal Translation

⁷ and he taketh the Book of the Covenant, and proclaimeth in the ears of the people, and they say, `All that which Jehovah hath spoken we do, and obey.'

⁸ And Moses taketh the blood, and sprinkleth on the people, and saith, `Lo, the blood of the covenant which Jehovah hath made with you, concerning all these things.'

⁹ And Moses goeth up, Aaron also, Nadab and Abihu, and seventy of the elders of Israel,