Sh'mot 24:1-3 Then He said to Moshe, "Come up to the L-RD, you and Aharon, Nadav and Avihu and seventy of the elders of Israel, and you shall worship at a distance. Moshe alone, however, shall come near to the L-RD, but they shall not come near, nor shall the people come up with him." Then Moshe came and recounted to the people all the words of the L-RD and all the ordinances; and all the people answered with one voice, and said, "All the words which the L-RD has spoken we will do!"
Nadav and Avihu were Aharon's sons.
They confess with their mouths that they will do what the L-rd has spoken. This was a conditional covenant. Israel took on the responsibility of keeping the Torah. What a humbling responsibility. The Torah is good and was given for our protection. HaShem cannot bless you unless you are blessable. This is one reason hatred comes from other nations. HaSatan hates all those whom follow HaShem and His Word. Those who do not follow HaShem follow HaSatan. There is no middle ground. You either follow one or the other. You are either a servant of Him or you are a servant of His creation - the evil one.
The corresponding letter to this chapter is Beit-house, duality as in husband and wife; also division between good and evil.
Sh'mot 24:4-8 And Moshe wrote down all the words of the L-RD. 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. And he sent young men of the sons of Israel, and they offered burnt offerings and sacrificed young bulls as peace offerings to the L-RD. And Moshe 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 L-RD has spoken we will do, and we will be obedient!" So Moshe took the blood and sprinkled it on the people, and said, "Look the blood of the covenant, which the L-RD has made with you in accordance with all these words."
Young men of the sons of Israel - We stated in an earlier lesson that initially the first-born sons of Israel were to serve as priests. The young men mentioned here are probably the first-born sons from their families.
The book of the covenant - This is a portion of the book of Sh'mot (Exodus), specifically chapters 20 thru 23.
Moshe, Aharon, Nadav and Avihu who were preparing for the priestly office, and the 70 elders are allowed to go up to the foot of the mountain and see the G-d of Israel only because they had been sprinkled with blood. This is a foreshadowing. The fact that they are allowed to see G-d and live only after the sprinkling of blood points us to the good news. Those that trust that Yeshua's blood takes away their sins will then be able to be in the presence of G-d. We also become priests and will rise one day to be with HaShem without fear of harm through His mercy and peace.
1 Kefa (Peter) 1:2 according to the foreknowledge of G-d the Father, in sanctification of the Spirit, to obedience and sprinkling of the blood of Yeshua HaMashiach: Mercy to you and shalom be multiplied.