Albert Barnes Commentary Exodus 24:5

"And he sent young men of the children of Israel, who offered burnt-offerings, and sacrificed peace-offerings of oxen unto Jehovah." — Exodus 24:5 (ASV)

Young men of the children of Israel - See (Exodus 19:22; Exodus 28:1; Leviticus 1:5).

Burnt offerings ... peace offerings - The burnt offerings (Leviticus 1) symbolized the dedication of the nation to Yahweh, and the peace offerings (Leviticus 3) their communion with Yahweh and with each other.