Proverbs 2:17

Who is forsaking the guide of her youth, And the covenant of her God hath forgotten.

Jeremiah 3:4

Hast thou not henceforth called to Me, 'My father, Thou art the leader of my youth?

Proverbs 5:18

Let thy fountain be blessed, And rejoice because of the wife of thy youth,

Ezekiel 16:8

And I pass over by thee, and I see thee, And lo, thy time is a time of loves, And I spread My skirt over thee, And I cover thy nakedness, And I swear to thee, and come in to a covenant with thee, An affirmation of the Lord Jehovah, And thou dost become Mine.

Ezekiel 16:59-60

For thus said the Lord Jehovah: I have dealt with thee as thou hast done, In that thou hast despised an oath -- to break covenant.

Malachi 2:14-16

And ye have said, 'Wherefore?' Because Jehovah hath testified between thee And the wife of thy youth, That thou hast dealt treacherously against her, And she thy companion, and thy covenant-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 fountain be blessed, And rejoice because of the wife of thy youth,
Jeremiah 3:4
Hast thou not henceforth called to Me, 'My father, Thou art the leader of my youth?

Forgetteth

Ezekiel 16:8
And I pass over by thee, and I see thee, And lo, thy time is a time of loves, And I spread My skirt over thee, And I cover thy nakedness, And I swear to thee, and come in to a covenant with thee, An affirmation of the Lord Jehovah, And thou dost become Mine.
Malachi 2:14
And ye have said, 'Wherefore?' Because Jehovah hath testified between thee And the wife of thy youth, That thou hast dealt treacherously against her, And she thy companion, and thy covenant-wife.

General references

Exodus 20:14
'Thou dost not commit adultery.
Leviticus 15:20
'And anything on which she lieth in her separation is unclean, and anything on which she sitteth is unclean;
Numbers 5:12
'Speak unto the sons of Israel, and thou hast said unto them, When any man's wife turneth aside, and hath committed against him a trespass,