Leviticus 11:36

Nevertheless, a spring or cistern containing water will remain clean, but one who touches a carcass in it will be unclean.
BSB · Berean Standard Bible
Nevertheless a fountain or pit, wherein there is plenty of water, shall be clean: but that which toucheth their carcase shall be unclean.

Note wherein…: Heb. a gathering together of waters

KJV · King James Version
Nevertheless a spring or a cistern in which water is gathered shall be clean, but that which touches their carcass shall be unclean.
WEB · World English Bible
Nevertheless a fountain or a pit wherein is a gathering of water shall be clean: but that which toucheth their carcass shall be unclean.
ASV · American Standard Version

Related passages

From the Treasury of Scripture Knowledge, grouped by the word they explain.

a fountain
Zechariah 13:1; John 4:14