Exodus 30:19

Thou shalt . . . make a laver of brass, . . . and thou shalt put it between the tabernacle of the congregation and the altar, and thou shalt put water therein.

For Aaron and his sons shall wash their hands and their feet thereat: when they go into the tabernacle of the congregation, they shall wash with water, that they die not; . . . they shall wash their hands and their feet, that they die not.