King James Bible
He is the tower of salvation for his king: and sheweth mercy to his anointed, unto David, and to his seed for evermore.

New King James Version
“He is the tower of salvation to His king, And shows mercy to His anointed, To David and his descendants forevermore.”

American Standard Version
Great deliverance giveth he to his king, And showeth lovingkindness to his anointed, To David and to his seed, for evermore.

Berean Study Bible
Great salvation He brings to His king. He shows loving devotion to His anointed, to David and his descendants forever.”

Douay-Rheims Bible
Giving great salvation to his king, and shewing mercy to David his anointed, and to his seed for ever.

English Revised Version
Great deliverance giveth he to his king: and sheweth lovingkindness to his anointed, to David and to his seed, for evermore.

World English Bible
He gives great deliverance to his king, and shows loving kindness to his anointed, to David and to his seed, forevermore."

Young's Literal Translation
Magnifying the salvations of His king, And doing loving-kindness to His anointed, To David, and to his seed -- unto the age!'

2 Samuel 22:51 Additional Translations ...