Hebrews 13:4

Marriage {is} honourable in all, and the bed undefiled: but whoremongers and adulterers God will judge.

Deuteronomy 5:18

Neither shalt thou commit adultery.

Romans 7:2-3

For the woman which hath an husband is bound by the law to {her} husband so long as he liveth; but if the husband be dead, she is loosed from the law of {her} husband.

Romans 13:9

For this, Thou shalt not commit adultery, Thou shalt not kill, Thou shalt not steal, Thou shalt not bear false witness, Thou shalt not covet; and if {there be} any other commandment, it is briefly comprehended in this saying, namely, Thou shalt love thy neighbour as thyself.

Leviticus 20:10

And the man that committeth adultery with {another} man's wife, {even he} that committeth adultery with his neighbour's wife, the adulterer and the adulteress shall surely be put to death.

Matthew 5:27-28

Ye have heard that it was said by them of old time, Thou shalt not commit adultery:

Revelation 21:8

But the fearful, and unbelieving, and the abominable, and murderers, and whoremongers, and sorcerers, and idolaters, and all liars, shall have their part in the lake which burneth with fire and brimstone: which is the second death.

Leviticus 18:20

Moreover thou shalt not lie carnally with thy neighbour's wife, to defile thyself with her.