Ablution of Priests
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Exodus 29:4
Then present Aaron and his sons at the entrance to the Tent of Meeting and wash them with water.
Exodus 36:18–21
He also made fifty bronze clasps to join the tent together as a unit. / Additionally, he made for the tent a covering of ram skins dyed red, and over that a covering of fine leather. / Next, he constructed upright frames of acacia wood for the tabernacle.
Exodus 40:12, 31, 32
Then bring Aaron and his sons to the entrance to the Tent of Meeting and wash them with water. / and from it Moses, Aaron, and his sons washed their hands and feet. / They washed whenever they entered the Tent of Meeting or approached the altar, just as the LORD had commanded Moses.
Leviticus 8:6
Then Moses presented Aaron and his sons and washed them with water.
Leviticus 16:4, 24, 26, 28
He is to wear the sacred linen tunic, with linen undergarments. He must tie a linen sash around him and put on the linen turban. These are holy garments, and he must bathe himself with water before he wears them. / He is to bathe himself with water in a holy place and put on his own clothes. Then he must go out and sacrifice his burnt offering and the people’s burnt offering to make atonement for himself and for the people. / The man who released the goat as the scapegoat must wash his clothes and bathe himself with water; afterward he may reenter the camp.
Numbers 19:7–10, 19
Then the priest must wash his clothes and bathe his body in water; after that he may enter the camp, but he will be ceremonially unclean until evening. / The one who burned the heifer must also wash his clothes and bathe his body in water, and he too will be ceremonially unclean until evening. / Then a man who is ceremonially clean is to gather up the ashes of the heifer and store them in a ceremonially clean place outside the camp. They must be kept by the congregation of Israel for preparing the water of purification; this is for purification from sin.
2 Chronicles 4:6
He also made ten basins for washing and placed five on the south side and five on the north. The parts of the burnt offering were rinsed in them, but the priests used the Sea for washing.