Hebrews 13:4
Marriage should be considered honorable among all people and its sexual responsibilities should be faithfully kept. For God will judge [and condemn] those people who are sexually immoral and who are sexually unfaithful to their mates.
Matthew 5:27-28
"You have heard what was said [Exodus 20:14], 'You must not be sexually unfaithful to your mate.'
Matthew 19:18
The young man asked Him, "Which [ones]?" Jesus answered, "You must not murder. You must not be sexually unfaithful to your mate. You must not steal. You must not give false testimony.
Mark 10:11-12
And He said to them, "Whoever divorces his wife and marries another [woman] commits sexual unfaithfulness [toward her].
Romans 7:2-3
For a married woman is legally bound to her husband for as long as he lives. But, when he dies, she is released from the marriage contract.
Romans 13:9
For [the commandments are: Ex. 20:13ff], "You must not be sexually unfaithful to your mate. You must not murder. You must not steal. You must not have a strong desire for what belongs to someone else." These and any other commandments are summed up in these words, "You must love your neighbor the same as you love yourself."
Ephesians 5:3-5
But you should not even talk about sexual immorality, or any type of [moral] impurity, or greed. [Note: Possibly "greed" here means "desire for more" of such things]. Such talk is not suitable for saints [i.e., God's holy people].
James 4:4
You people who have become unfaithful to God, do you not know that being [intimate] friends with the world [of sin] means hostility toward God? Therefore, whoever determines to be an [intimate] friend of the world becomes an enemy of God.
Revelation 21:8
But the place for cowards, and unbelievers, and disgusting people [i.e., because of their terrible sins], and murderers, and sexually immoral people, and sorcerers, and idolaters, and all liars, will be the lake that burns with fire and sulphur. This is the second death."
Treasury of Scripture Knowledge did not add