Bamidbar 31:23-25

Orthodox Jewish Bible

²³ Everything that can withstand eish, ye shall make it go through the eish, and it shall be tahor; nevertheless it shall be purified with the mayim of niddah; and all that can not withstand the eish ye shall make go through the mayim.

²⁴ And ye shall wash your begadim on Yom HaShevi’i, and ye shall be tahor, and afterward ye shall come into the machaneh.

²⁵ And Hashem spoke unto Moshe, saying,