Exodus 40
13 Ref You are to put on Aaron the holy robes; and you are to put oil on him, and make him holy, so that he may be my priest.
14 Ref And take his sons with him and put coats on them;
15 Ref And put oil on them as you did on their father, so that they may be my priests: the putting on of oil will make them priests for ever, from generation to generation.