If a man shall lie with a woman, wittingly and willingly. See on Leviticus 15:24, Leviticus 18:19. Her sisters, i.e. her monthly infirmity. Her fountain, or her issue. Thus the fountain of blood in Mark 5:29, is the issue of blood, Luke 8:44, the fountain put for the stream, the cause for the effect, which is common.
Related Commentaries of Leviticus 20:18
Leviticus 20:18
18 And if a man shall lie with a woman having her sickness, and shall uncover her nakedness; he hath discovereda her fountain, and she hath uncovered the fountain of her blood: and both of them shall be cut off from among their people.