Proverbs 2:17

That leaves the companion of her youth
And forgets the covenant of her God;

Jeremiah 3:4

“Have you not just now called to Me,
My Father, You are the friend of my youth?

Proverbs 5:18

Let your fountain be blessed,
And rejoice in the wife of your youth.

Ezekiel 16:8

“Then I passed by you and saw you, and behold, you were at the time for love; so I spread My skirt over you and covered your nakedness. I also swore to you and entered into a covenant with you so that you became Mine,” declares the Lord God.

Ezekiel 16:59-60

For thus says the Lord God, “I will also do with you as you have done, you who have despised the oath by breaking the covenant.

Malachi 2:14-16

Yet you say, ‘For what reason?’ Because the Lord has been a witness between you and the wife of your youth, against whom you have dealt treacherously, though she is your companion 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
Let 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 friend of my youth?

Forgetteth

Ezekiel 16:8
“Then I passed by you and saw you, and behold, you were at the time for love; so I spread My skirt over you and covered your nakedness. I also swore to you and entered into a covenant with you so that you became Mine,” declares the Lord God.
Malachi 2:14
Yet you say, ‘For what reason?’ Because the Lord has been a witness between you and the wife of your youth, against whom you have dealt treacherously, though she is your companion and your wife by covenant.

General references

Exodus 20:14
You shall not commit adultery.
Leviticus 15:20
Everything also on which she lies during her menstrual impurity shall be unclean, and everything on which she sits shall be unclean.
Numbers 5:12
“Speak to the sons of Israel and say to them, ‘If any man’s wife goes astray and is unfaithful to him,