2 Samuel 22:51 in the King James Version
He is the tower of salvation for his king: and sheweth mercy to his anointed, unto David, and to his seed for evermore.
Context
50 Therefore I will give thanks to you, LORD, among the nations, and will sing praises to your name.
51 He gives great deliverance to his king, and shows loving kindness to his anointed, to David and to his offspring, forever more.”