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 29:35

29:35 “Thus you are to do for Aaron and for his sons, according to all that I have commanded you; you are to consecrate them for seven days.