Nevertheless a spring or a cistern, in which there is plenty of water, shall be clean, but whatever touches any such carcass becomes unclean.
Leviticus 11:36
Surrounding context
11:35 And everything on which a part of any such carcass falls shall be unclean; whether it is an oven or cooking stove, it shall be broken down; for they are unclean, and shall be unclean to you.
11:36 Nevertheless a spring or a cistern, in which there is plenty of water, shall be clean, but whatever touches any such carcass becomes unclean.
11:37 And if a part of any such carcass falls on any planting seed which is to be sown, it remains clean.