Exodus 40:29-33

29He set the altar of burnt offering near the entrance to the tabernacle, the tent of meeting, and offered on it burnt offerings and grain offerings, as the Lord commanded him.

30He placed the basin between the tent of meeting and the altar and put water in it for washing,

31and Moses and Aaron and his sons used it to wash their hands and feet.

32They washed whenever they entered the tent of meeting or approached the altar, as the Lord commanded Moses.

33Then Moses set up the courtyard around the tabernacle and altar and put up the curtain at the entrance to the courtyard. And so Moses finished the work.