Leviticus 15:24

Female Bodily Discharges

²³ And if it be on her bed, or on anything on which she sits, when he touches it, he shall be unclean until the evening. ²⁴  And if any man lie with her at all, and her impurity is upon him, he shall be unclean seven days; and all the beds on which he lies shall be unclean. ²⁵ And if a woman has a discharge of blood many days other than the time of her impurity, or if it runs beyond the time of her impurity; all the days of the discharge of her uncleanness shall be as the days of her impurity: she shall be unclean.

Sexual Relations

Leviticus 20:18

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

Leviticus 18:19

Also you shall not approach unto a woman to uncover her nakedness, as long as she is put apart for her uncleanness.

Ezekiel 18:6

And has not eaten upon the mountains, neither has lifted up his eyes to the idols of the house of Israel, neither has defiled his neighbor's wife, neither has come near a woman during her impurity,

Leviticus 15:33

And of her that is sick of her impurity, and of him that has a discharge, of the man, and of the woman, and of him that lies with her who is unclean.

Ezekiel 22:10

In you have they uncovered their fathers' nakedness: in you have they violated her that was set apart for her impurity.

1 Thessalonians 5:22

Abstain from all appearance of evil.

Hebrews 13:4

Let marriage be held in honor by all, and the bed undefiled: but fornicators and adulterers God will judge.

1 Peter 2:11

Dearly beloved, I beseech you as aliens and exiles, abstain from fleshly lusts, which war against the soul;