Exodus 30:17-21

17 And the Lord said to Moses,
18 You are to make a brass washing-vessel, with a brass base; and put it between the Tent of meeting and the altar, with water in it;
19 That it may be used by Aaron and his sons for washing their hands and feet;
20 Whenever they go into the Tent of meeting they are to be washed with water, to keep them from death; and whenever they come near to do the work of the altar, or to make an offering by fire to the Lord,
21 Their hands and feet are to be washed. so that they may be safe from death: this is an order to them for ever; to him and his seed from generation to generation.
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