wilt prolong the king's life
Psalm 21:4
He asked life of thee, and thou gavest it him, even length of days for ever and ever.
Psalm 21:6
For thou hast made him most blessed for ever: thou hast made him exceeding glad with thy countenance.
Psalm 72:15-17
15
And he shall live, and to him shall be given of the gold of Sheba: prayer also shall be made for him continually; and daily shall he be praised.
16
There shall be an handful of corn in the earth upon the top of the mountains; the fruit thereof shall shake like Lebanon: and they of the city shall flourish like grass of the earth.
17
His name shall endure for ever: his name shall be continued as long as the sun: and men shall be blessed in him: all nations shall call him blessed.
Isaiah 53:10
Yet it pleased the LORD to bruise him; he hath put him to grief: when thou shalt make his soul an offering for sin, he shall see his seed, he shall prolong his days, and the pleasure of the LORD shall prosper in his hand.
many generations
Psalm 89:36
His seed shall endure for ever, and his throne as the sun before me.
Psalm 89:37
It shall be established for ever as the moon, and as a faithful witness in heaven. Selah.