Exodus 30:18-20

Darby Translation

¹⁸ Thou shalt also make a laver of copper, and its stand of copper, for washing; and thou shalt put it between the tent of meeting and the altar, and shalt put water in it.

¹⁹ And Aaron and his sons shall wash their hands and their feet out of it.

²⁰ When they go into the tent of meeting, they shall wash with water, that they may not die; or when they come near to the altar to serve, to burn an offering by fire to Jehovah.