Priest: The Time of Moses: Ablutions of
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Exodus 40:30–32
He placed the basin between the Tent of Meeting and the altar and put water in it for washing; / and from it Moses, Aaron, and his sons washed their hands and feet. / They washed whenever they entered the Tent of Meeting or approached the altar, just as the LORD had commanded Moses.
Leviticus 16:24
He is to bathe himself with water in a holy place and put on his own clothes. Then he must go out and sacrifice his burnt offering and the people’s burnt offering to make atonement for himself and for the people.