Exodus 40:31-33

Amplified Bible

³¹ Then from it Moses and Aaron and his sons washed their hands and their feet. ³² When they entered the Tent of Meeting, and when they approached the altar, they washed, just as the Lord commanded Moses. ³³ And he erected the courtyard all around the tabernacle and the altar, and hung the screen (curtain) at the gateway of the courtyard. So Moses finished the work.