King James Version (KJV)
Thou wilt keep {him} in perfect peace, {whose} mind {is} stayed {on thee}: because he trusteth in thee. {perfect...: Heb. peace, peace} {mind: or, thought, or, imagination}
Modern English
You will keep whoever’s mind is steadfast in perfect peace, because he trusts in you.
Hebrew
יֵ֣צֶר סָמ֔וּךְ תִּצֹּ֖ר שָׁל֣וֹם ׀ שָׁל֑וֹם כִּ֥י בְךָ֖ בָּטֽוּחַ׃
yeṣer samvk tiṣor shalvom ׀ shalvom kiy bka baṭvḥa