Exodus 29:21, 29

Then you shall take some of the blood that is on the altar and some of the anointing oil, and sprinkle it on Aaron and on his garments and on his sons and on his sons’ garments with him; so he and his garments shall be consecrated, as well as his sons and his sons’ garments with him.

“The holy garments of Aaron shall be for his sons after him, that in them they may be anointed and ordained.