Then Moses went up with Aaron, Nadab and Abihu, and seventy of the elders of Israel,
The people having, besides their submission to the ceremony of the sprinkling of blood, declared their well-pleasedness in their God and his law, again and again, God here gives to their representatives some special tokens of his favour to them (for God meets him that rejoices and works righteousness), and admits them nearer to him than they could have expected.
Commenting on Exodus 24:9-11
Then went up Moses and Aaron, Nadab and Abihu,.... After the above things were done, the words of the Lord were told the people, and the book of the covenant read unto them, to which they agreed, sacrifices were offered, and the blood of them sprinkled on the altar, and on the people.
Then went up Moses, and Aaron--in obedience to a command given (Exo 24:1-2; also Exo 19:24), previous to the religious engagement of the people, now described. Nadab, and Abihu--the two oldest sons of Aaron [Exo 6:23]. seventy of the elders--a select number; what was the principle of selection is not said; but they were the chief representatives, the most conspicuous for official rank and station...