Leviticus 11:36

A spring, however, or a cistern for collecting water remains clean, but anyone who touches one of these carcasses is unclean.

(New International Version)

'Nevertheless a spring or a cistern collecting water shall be clean, though the one who touches their carcass shall be unclean.

(New American 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.

(King James Version)