GOD'S WORD® Translation
With perfect peace you will protect those whose minds cannot be changed, because they trust you.

American Standard Version
Thou wilt keep him in perfect peace, whose mind is'stayed on thee ; because he trusteth in thee.

Berean Study Bible
You will keep in perfect peace the steadfast of mind, because he trusts in You.

Douay-Rheims Bible
The old error is passed away: thou wilt keep peace: peace, because we have hoped in thee.

English Revised Version
Thou wilt keep him in perfect peace, whose mind is stayed on thee: because he trusteth in thee.

King James Bible
Thou wilt keep him in perfect peace, whose mind is stayed on thee: because he trusteth in thee.

World English Bible
You will keep whoever's mind is steadfast in perfect peace, because he trusts in you.

Young's Literal Translation
An imagination supported Thou fortifiest peace -- peace! For in Thee it is confident.

Isaiah 26:3 Additional Translations ...