Proverbs 2:17

forsaketh the husband of her youth, and forgetteth the covenant of her God.

Jeremiah 3:4

Else wouldst thou say unto me, 'O my father, thou art he that hast brought me up, and led me from my youth:

Proverbs 5:18

Let thy well be blessed; and be glad with the wife of thy youth.

Ezekiel 16:8

Now when I went by thee, and looked upon thee: behold, thy time was come; yea, even the time to vow thee. Then spread I my clothes over thee, to cover thy dishonesty: Yea, I made an oath unto thee, and married myself with thee, sayeth the LORD God; and so thou becamest mine own.

Ezekiel 16:59-60

For thus sayeth the LORD God: I should, by right, deal with thee, as thou hast done. Thou hast despised the oath, and broken the covenant.

Malachi 2:14-16

And yet ye say, 'Wherefore?' Even because that whereas the LORD made a covenant betwixt thee and the wife of thy youth, thou hast despised her: Yet is she thine own companion and married wife.

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 thy well be blessed; and be glad with the wife of thy youth.
Jeremiah 3:4
Else wouldst thou say unto me, 'O my father, thou art he that hast brought me up, and led me from my youth:

Forgetteth

Ezekiel 16:8
Now when I went by thee, and looked upon thee: behold, thy time was come; yea, even the time to vow thee. Then spread I my clothes over thee, to cover thy dishonesty: Yea, I made an oath unto thee, and married myself with thee, sayeth the LORD God; and so thou becamest mine own.
Malachi 2:14
And yet ye say, 'Wherefore?' Even because that whereas the LORD made a covenant betwixt thee and the wife of thy youth, thou hast despised her: Yet is she thine own companion and married wife.

General references

Exodus 20:14
"Thou shalt not break wedlock.
Leviticus 15:20
And all that she lieth or sitteth upon as long as she is put apart shall be unclean.
Numbers 5:12
"Speak unto the children of Israel, and say unto them, 'If any man's wife go aside and trespass against him,