Exodus 40:29-33

29He put the altar for burnt offerings at the entrance to the tent (the tent of meeting). He sacrificed burnt offerings and grain offerings on it. Moses followed the Lord’s instructions.

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

31Moses, Aaron, and his sons used this water to wash their hands and feet.

32They would wash whenever they went into the tent of meeting or whenever they approached the altar. Moses followed the Lord’s instructions.

33He set up the courtyard around the tent and the altar and put up the screen at the entrance to the courtyard. Finally, Moses finished the work.