Leviticus 15:24

Female Bodily Discharges

²³ If her blood touches anything on the bed or anything she sits on, it will be unclean until evening. ²⁴ If a man actually lies with her so that her menstrual impurity is on him, he shall be unclean seven days, and every bed on which he lies shall be unclean. ²⁵ When a woman has a discharge of blood for many days other than her monthly period, she is unclean. If her period lasts longer than usual, she will be unclean as long as she has a discharge. It is similar to her period.

Sexual Relations

Leviticus 20:18

If a man has intercourse with a woman during her monthly period, both of them are to be driven out of the community, because they have broken the regulations about ritual uncleanness.

Leviticus 18:19

Never have sexual intercourse with a woman while she is unclean during her monthly period.

Ezekiel 18:6

and does not eat at the mountain shrines or lift up his eyes to the idols of the house of Israel, or defile his neighbor's wife or approach a woman during her menstrual period;

Leviticus 15:33

for any woman who has her period, for any man or woman who has a discharge, or for any man who has sexual intercourse with a woman when she is unclean.

Ezekiel 22:10

Some of them sleep with their father's wife. Some force women to have intercourse with them during their period.

1 Thessalonians 5:22

Abstain from all appearance of evil.

Hebrews 13:4

Let marriage be honorable among all, and let the marriage bed be undefiled: for God will judge fornicators and adulterers.

1 Peter 2:11

Beloved, I request that you as aliens and strangers abstain from fleshly lust (desires), which causes conflict in you.