Proverbs 2:17
Which forsaketh the guide of her youth, and forgetteth the covenant of her God.
Cross-reference
In Proverbs 5:18, rejoicing in the wife of your youth contrasts with the strange woman who forsakes the companion of her youth (Proverbs 2:17).
Jeremiah 3:4 uses the same 'guide of my youth' imagery for Israel's unfaithfulness—direct parallel to forsaking the covenant companion.
Ezekiel 16:59 describes despising the oath and breaking the covenant—identical to the 'covenant of her God' abandoned here.
Ezekiel 16:60 contrasts this forgetfulness: God remembers the covenant of youth and promises restoration.
Malachi 2:14-16 explicitly condemns treachery against the wife of your youth, calling it covenant-breaking—direct parallel.
Matthew 19:6 declares marriage indissoluble—contrasting the forsaking of the covenant described here.
Ezekiel 16:8 recounts God making a covenant with Jerusalem in her youth—the very covenant this woman forgets.
Joel 1:8 uses 'husband of her youth' for mourning loss—same idiom, but situation is grief rather than betrayal.