Proverbs 6:34
“For jealousy is the rage of a man: therefore he will not spare in the day of vengeance.”
But whoso committeth adultery with a woman lacketh understanding: he that doeth it destroyeth his own soul.
A wound and dishonour shall he get; and his reproach shall not be wiped away.
For jealousy is the rage of a man: therefore he will not spare in the day of vengeance.
He will not regard any ransom; neither will he rest content, though thou givest many gifts.
Counter-Arguments
The strongest case that this verse does not belong in this theme.

Cross-References
“And the spirit of jealousy come upon him, and he be jealous of his wife, and she be defiled: or if the spirit of jealousy come upon him, and he be jealous of his wife, and she be not defiled:”
“Wrath is cruel, and anger is outrageous; but who is able to stand before envy?”
“Set me as a seal upon thine heart, as a seal upon thine arm: for love is strong as death; jealousy is cruel as the grave: the coals thereof are coals of fire, which hath a most vehement flame.”
“Thou shalt not bow down thyself to them, nor serve them: for I the Lord thy God am a jealous God, visiting the iniquity of the fathers upon the children unto the third and fourth generation of them that hate me;”
“The Lord will not spare him, but then the anger of the Lord and his jealousy shall smoke against that man, and all the curses that are written in this book shall lie upon him, and the Lord shall blot out his name from under heaven.”