After Moses waved the breast before the Lord, he sprinkled Aaron, his sons, and their garments with a combination of oil and blood. Aaron and his sons were objects of sprinkling just as the other utensils had been purified. This association of the priests with the tabernacle's holy objects speaks of the intimate connection between the two. Wenham (p. 142) says, “Through the blood from the altar Aaron is ordained to offer sacrifice at the altar.”
30 Then Moses took some of the anointing oil and of the blood that was on the altar and sprinkled it on Aaron and his garments, and also on his sons and his sons’ garments. So he consecrated Aaron and his garments, and his sons and his sons’ garments with him.