The use of the bath was very frequent among the Hebrews (Leviticus 14:8; Numbers 19:19, ect.). The high priest at his inauguration (Leviticus 8:6), and on the day of atonement, was required to bathe himself (16:4,24). The "pools" mentioned in Neh Nehemiah 20:20, Isaiah 22:11, John 9:7, were public bathing-places.
These dictionary topics are from M.G. Easton M.A., D.D., Illustrated Bible Dictionary, Third Edition, published by Thomas Nelson, 1897. Public Domain, copy freely.
Easton, Matthew George. "Entry for 'Baths'". "Easton's Bible Dictionary".