Exodus 29:7 "Then you shall take the anointing oil and pour it on his head and anoint him.

Exodus 30:30 "You shall anoint Aaron and his sons, and consecrate them, that they may minister as priests to Me.

Leviticus 21:10 'The priest who is the highest among his brothers, on whose head the anointing oil has been poured and who has been consecrated to wear the garments, shall not uncover his head nor tear his clothes;

Leviticus 21:12 nor shall he go out of the sanctuary nor profane the sanctuary of his God, for the consecration of the anointing oil of his God is on him; I am the LORD.

Psalm 133:2 It is like the precious oil upon the head, Coming down upon the beard, Even Aaron's beard, Coming down upon the edge of his robes. (NASB ©1995)