The Lord spoke to Moses:
References for Exodus 30:17
"Make a bronze basin for washing and a bronze stand for it. Set it between the tent of meeting and the altar, and put water in it.
Aaron and his sons must wash their hands and feet from the basin.
Whenever they enter the tent of meeting or approach the altar to minister by burning up an offering to the Lord, they must wash with water so that they will not die.
They must wash their hands and feet so that they will not die; this is to be a permanent statute for them, for Aaron and his descendants throughout their generations."