Psalm 18:50 in the King James Version
Great deliverance giveth he to his king; and sheweth mercy to his anointed, to David, and to his seed for evermore.
Context
49 Therefore I will give thanks to you, LORD, among the nations, and will sing praises to your name.
50 He gives great deliverance to his king, and shows loving kindness to his anointed, to David and to his offspring, forever more.