Leviticus 15:31

"Thus you shall separate the children of Israel from their uncleanness, lest they die in their uncleanness when they defile My tabernacle that is among them.

Surrounding context

15:30 Then the priest shall offer the one as a sin offering and the other as a burnt offering, and the priest shall make atonement for her before the LORD for the discharge of her uncleanness.

15:31 "Thus you shall separate the children of Israel from their uncleanness, lest they die in their uncleanness when they defile My tabernacle that is among them.

15:32 This is the law for one who has a discharge, and for him who emits semen and is unclean thereby,

Translation and sources