Exodus 30:19-22 King James Version (KJV)

19. For Aaron and his sons shall wash their hands and their feet thereat:

20. When they go into the tabernacle of the congregation, they shall wash with water, that they die not; or when they come near to the altar to minister, to burn offering made by fire unto the Lord:

21. So they shall wash their hands and their feet, that they die not: and it shall be a statute for ever to them, even to him and to his seed throughout their generations.

22. Moreover the Lord spake unto Moses, saying,

Exodus 30