The old error has gone away. You will serve peace: peace, for we have hoped in you
Other versions
King James Version
Thou wilt keep him in perfect peace, whose mind is stayed on thee: because he trusteth in thee. English Standard Version
You keep him in perfect peace whose mind is stayed on you, because he trusts in you.New International Version
You will keep in perfect peace him whose mind is steadfast, because he trusts in you.