Leviticus 20:10

20:10 If a man commits adultery with his neighbor’s wife, both the adulterer and the adulteress must be put to death.

Numbers 5:22-27

5:22 and this water that causes the curse will go into your stomach, and make your abdomen swell and your thigh rot.” Then the woman must say, “Amen, amen.”

5:23 “‘Then the priest will write these curses on a scroll and then scrape them off into the bitter water. 5:24 He will make the woman drink the bitter water that brings a curse, and the water that brings a curse will enter her to produce bitterness. 5:25 The priest will take the grain offering of suspicion from the woman’s hand, wave the grain offering before the Lord, and bring it to the altar. 5:26 Then the priest will take a handful of the grain offering as its memorial portion, burn it on the altar, and afterward make the woman drink the water. 5:27 When he has made her drink the water, then, if she has defiled herself and behaved unfaithfully toward her husband, the water that brings a curse will enter her to produce bitterness – her abdomen will swell, her thigh will fall away, and the woman will become a curse among her people.

Ezekiel 23:45-47

23:45 But upright men will punish them appropriately for their adultery and bloodshed, because they are adulteresses and blood is on their hands.

23:46 “For this is what the sovereign Lord says: Bring up an army against them and subject them to terror and plunder. 23:47 That army will pelt them with stones and slash them with their swords; they will kill their sons and daughters and burn their houses.

John 8:4-5

8:4 and said to Jesus, “Teacher, this woman was caught in the very act of adultery. 8:5 In the law Moses commanded us to stone to death such women. What then do you say?”

Hebrews 13:4

13:4 Marriage must be honored among all and the marriage bed kept undefiled, for God will judge sexually immoral people and adulterers.