Proverbs 2:17

she who forsakes the partner of her youth and has forgotten the covenant of her God,

Jeremiah 3:4

Have you not just now called to me, 'My father, you [are] the close friend of my youth?

Proverbs 5:18

May your fountain be blessed, and rejoice in the wife of your youth.

Ezekiel 16:8

" 'And I passed by you, and I saw you, and look, {your time of lovemaking had come}, and [so] I spread out my hem over you, and I covered your nakedness, and I swore to you, and I entered into a covenant with you,' {declares} the Lord Yahweh, 'and {you became mine}.

Ezekiel 16:59-60

'For thus says the Lord Yahweh: And I will do it to you {according to what you have done}, who despised [the] oath to break covenant.

Malachi 2:14-16

But you ask, "{For what reason}?" Because Yahweh stands as a witness between you and the wife of your youth, against whom you have been unfaithful, even though she [is] your marriage partner and {your wife by covenant}.

Treasury of Scripture Knowledge

Summary

Which forsaketh the guide of her youth, and forgetteth the covenant of her God.

Bible References

The guide

Proverbs 5:18
May your fountain be blessed, and rejoice in the wife of your youth.
Jeremiah 3:4
Have you not just now called to me, 'My father, you [are] the close friend of my youth?

Forgetteth

Ezekiel 16:8
" 'And I passed by you, and I saw you, and look, {your time of lovemaking had come}, and [so] I spread out my hem over you, and I covered your nakedness, and I swore to you, and I entered into a covenant with you,' {declares} the Lord Yahweh, 'and {you became mine}.
Malachi 2:14
But you ask, "{For what reason}?" Because Yahweh stands as a witness between you and the wife of your youth, against whom you have been unfaithful, even though she [is] your marriage partner and {your wife by covenant}.

General references

Exodus 20:14
"You shall not commit adultery.
Leviticus 15:20
And anything upon which she lies down during her menstruation shall become unclean, and anything upon which she sits shall become unclean.
Numbers 5:12
"Speak to the {Israelites} and say to them, 'If any man's wife goes astray and acts unfaithfully to him,