Proverbs 2:17

Forsaking the friend of her youth, and forgetting the covenant of her God.

Jeremiah 3:4

From the time didst thou not call to me, My father, thou the friend of my youth?

Proverbs 5:18

Thy fountain shall be blessed: and rejoice from the wife of thy youth.

Ezekiel 16:8

And I shall pass by thee and see thee, and behold, thy time the time of loves; and I shall spread my wing over thee and cover thy nakedness: and I shall swear to thee, and come into covenant with thee, says the Lord Jehovah, and thou shalt be to me.

Ezekiel 16:59-60

For thus said the Lord Jehovah: And doing with thee according as thou didst who despised the oath to break the covenant

Malachi 2:14-16

And ye said, For what? For that Jehovah testified between thee and between the wife of thy youth, which thou didst deal faithlessly against her, and she thy companion and the wife of thy 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
Thy fountain shall be blessed: and rejoice from the wife of thy youth.
Jeremiah 3:4
From the time didst thou not call to me, My father, thou the friend of my youth?

Forgetteth

Ezekiel 16:8
And I shall pass by thee and see thee, and behold, thy time the time of loves; and I shall spread my wing over thee and cover thy nakedness: and I shall swear to thee, and come into covenant with thee, says the Lord Jehovah, and thou shalt be to me.
Malachi 2:14
And ye said, For what? For that Jehovah testified between thee and between the wife of thy youth, which thou didst deal faithlessly against her, and she thy companion and the wife of thy covenant

General references

Exodus 20:14
Thou shalt not commit adultery.
Leviticus 15:20
And every thing which she shall lie upon it in her uncleanness, shall be unclean: and every thing which she shall sit upon it shall be unclean.
Numbers 5:12
Speak to the sons of Israel and say to them, A man, a man when his wife shall turn aside, and she covered a transgression against him,