Exodus 30:19-21

ECB(i) 19 for Aharon and his sons to baptize their hands and their feet therein: 20 when they go into the tent of the congregation they baptize with water so that they die not - or when they come near to the sacrifice altar to minister - to incense a firing to Yah Veh: 21 then they baptize their hands and their feet, so that they die not: and it becomes an eternal statute to them - to him and to his seed throughout their generations.