NET
50 He gives his king magnificent victories; he is faithful to his chosen ruler, to David and his descendants forever.”
Darby
50 [It is he] who giveth great deliverances to his king, and sheweth loving-kindness to his anointed, to David, and to his seed for evermore.
KJV
50 Great deliverance giveth he to his king; and sheweth mercy to his anointed, to David, and to his seed for evermore.