Charles Ellicott Commentary Leviticus 20:18

"And if a man shall lie with a woman having her sickness, and shall uncover her nakedness; he hath made naked her fountain, and she hath uncovered the fountain of her blood: and both of them shall be cut off from among their people." — Leviticus 20:18 (ASV)

Having her sickness. —See Leviticus 15:24; Leviticus 18:19.