They washed whenever they entered the tent of meeting or approached the altar, as the Lord commanded Moses.
NMVWhen they went into the tent of the congregation, and when they came near unto the altar, they washed; as the LORD-Yehōvah (Messiah Pre-Incarnate) commanded Moshe [He Who Draws Out Of The Waters].
OJBWhen they went into the Ohel Mo'ed, and when they came near unto the Mizbe'ach, they washed; as Hashem commanded Moshe.
RVwhen they went into the tent of meeting, and when they came near unto the altar, they washed: as the LORD commanded Moses.
Onkelos (Etheridge)In their going into the tabernacle of ordinance and in their approachment to the altar, they purified (themselves), as the Lord commanded Mosheh.
T4T[40:31–32]Every time Moses/I and Aaron and his sons went into the Sacred Tent or went to the altar, they/we washed their/our hands and feet ritually, exactly as Yahweh had commanded Moses/me.