Verses with the word fret in the Old Testament (7 verses):

Leviticus 13:55
And the priest shall look on the plague, after that it is washed: and, behold, if the plague have not changed his colour, and the plague be not spread; it is unclean; thou shalt burn it in the fire; it is fret inward, whether it be bare within or without.

1 Samuel 1:6
And her adversary also provoked her sore, for to make her fret, because the LORD had shut up her womb.

Psalms 37:1
Fret not thyself because of evildoers, neither be thou envious against the workers of iniquity.

Psalms 37:7
Rest in the LORD, and wait patiently for him: fret not thyself because of him who prospereth in his way, because of the man who bringeth wicked devices to pass.

Psalms 37:8
Cease from anger, and forsake wrath: fret not thyself in any wise to do evil.

Proverbs 24:19
Fret not thyself because of evil men, neither be thou envious at the wicked:

Isaiah 8:21
And they shall pass through it, hardly bestead and hungry: and it shall come to pass, that when they shall be hungry, they shall fret themselves, and curse their king and their God, and look upward.