'Fountain' in the Bible

Nevertheless a fountain or pit, wherein there is plenty of water, shall be clean: but that which toucheth their carcase shall be unclean.

and he hath brought it near before Jehovah, and hath made atonement for her, and she hath been cleansed from the fountain of her blood; this is the law of her who is bearing, in regard to a male or to a female.

And if a man shall lie with a woman having her sickness, and shall uncover her nakedness; he hath discovered her fountain, and she hath uncovered the fountain of her blood: and both of them shall be cut off from among their people.