Isaiah 26:3
“Thou wilt keep him in perfect peace, whose mind is stayed on thee: because he trusteth in thee.”
In that day shall this song be sung in the land of Judah; We have a strong city; salvation will God appoint for walls and bulwarks.
Open ye the gates, that the righteous nation which keepeth the truth may enter in.
Thou wilt keep him in perfect peace, whose mind is stayed on thee: because he trusteth in thee.
Trust ye in the Lord for ever: for in the Lord Jehovah is everlasting strength:
For he bringeth down them that dwell on high; the lofty city, he layeth it low; he layeth it low, even to the ground; he bringeth it even to the dust.
Counter-Arguments
The strongest case that this verse does not belong in this theme.

Related Verses
“I will both lay me down in peace, and sleep: for thou, Lord, only makest me dwell in safety.”
“Commit thy way unto the Lord; trust also in him; and he shall bring it to pass.”
“He will not suffer thy foot to be moved: he that keepeth thee will not slumber.”
“Preserve me, O God: for in thee do I put my trust.”
“Great peace have they which love thy law: and nothing shall offend them.”