Reference: Baths
Easton
The use of the bath was very frequent among the Hebrews (Le 14:8; Nu 19:19, ect.). The high priest at his inauguration (Le 8:6), and on the day of atonement, was required to bathe himself (Le 16:4,24). The "pools" mentioned in Ne 3:15-16; 2Ki 20:20; Isa 22:11; Joh 9:7, were public bathing-places.
See Verses Found in Dictionary
Then Moses presented Aaron and his sons and washed them with water.
The one who is to be cleansed must wash his clothes, shave off all his hair, and bathe with water; he is clean. Afterwards he may enter the camp, but he must remain outside his tent for seven days.
He is to wear a holy linen tunic, and linen undergarments are to be on his body. He must tie a linen sash [around him] and wrap his head with a linen turban. These are holy garments; he must bathe his body with water before he wears them.
He will bathe his body with water in a holy place and put on his clothes. Then he must go out and sacrifice his burnt offering and the people's burnt offering; he will make atonement for himself and for the people.
"The one who is clean is to sprinkle the unclean person on the third day and the seventh day. After he purifies the unclean person on the seventh day, the one being purified must wash his clothes and bathe in water, and he will be clean by evening.
Shallun son of Col-hozeh, ruler over the district of Mizpah, repaired the Fountain Gate. He rebuilt it and roofed it. Then he installed its doors, bolts, and bars. He also made repairs to the wall of the Pool of Shelah near the king's garden, as far as the stairs that descend from the city of David. After him Nehemiah son of Azbuk, ruler over half the district of Beth-zur, made repairs up to [a point] opposite the tombs of David, as far as the artificial pool and the House of the Warriors.
You made a reservoir between the walls for the waters of the ancient pool, but you did not look to the One who made it, or consider the One who created it long ago.
"Go," He told him, "wash in the pool of Siloam" (which means "Sent"). So he left, washed, and came back seeing.