NET

36 For David, after he had served God’s purpose in his own generation, died, was buried with his ancestors, and experienced decay,

Darby

36 For David indeed, having in his own generation ministered to the will of God^D7832, fell asleep, and was added to his fathers and saw corruption.

Darby Bible Notes

God - Or 'having served his own generation by the will of God.'

KJV

36 For David, after he had served his own generation by the will of God^K6771, fell on sleep, and was laid unto his fathers, and saw corruption:

KJV Bible Notes

own generation by the will of God: Or, after he had in his own age served the will of God.