Exodus 29:1

NOW these are the things which thou shalt do for them. Thou shalt consecrate them that they may minister to Me in the priest’s office. For this purpose thou shalt take one young bull of the herd and two rams without blemish

And these are the things which thou shalt do to them: thou shalt sanctify them, so that they shall serve me in the priesthood; and thou shalt take one young calf from the herd, and two unblemished rams;