Exodus 40:31 KJV

And Moses and Aaron and his sons washed their hands and their feet thereat:
Exodus 40:31, King James Version

In context

30 And he set the laver between the tent of the congregation and the altar, and put water there, to wash withal.

31 And Moses and Aaron and his sons washed their hands and their feet thereat:

32 When they went into the tent of the congregation, and when they came near unto the altar, they washed; as the Lord commanded Moses.