Exodus 29:9

29:9 and wrap the sashes around Aaron and his sons and put headbands on them, and so the ministry of priesthood will belong to them by a perpetual ordinance. Thus you are to consecrate Aaron and his sons.

Exodus 29:1

The Consecration of Aaron and His Sons

29:1 “Now this is what you are to do for them to consecrate them so that they may minister as my priests. Take a young bull and two rams without blemish;

Exodus 12:31

12:31 Pharaoh summoned Moses and Aaron in the night and said, “Get up, get out from among my people, both you and the Israelites! Go, serve the Lord as you have requested!

Exodus 13:1

The Law of the Firstborn

13:1 The Lord spoke to Moses:

Exodus 13:1

The Law of the Firstborn

13:1 The Lord spoke to Moses:

Hebrews 5:4

5:4 And no one assumes this honor on his own initiative, but only when called to it by God, as in fact Aaron was.