Exodus 24:5
"And he sent young men of the children of Israel, which offered burnt offerings, and sacrificed peace offerings of oxen unto the LORD."
Cross References (ranked by relevance)
Exodus 18:12
And Jethro, Moses’ father in law, took a burnt offering and sacrifices for God: and Aaron came, and all the elders of Israel, to eat bread with Moses’ father in law before God.
Exodus 19:22
And let the priests also, which come near to the LORD, sanctify themselves, lest the LORD break forth upon them.