You will enter the grave with abundance, just as a crop of wheat is gathered in its time
Other versions
King James Version
Thou shalt come to thy grave in a full age, like as a shock of corn cometh in in his season. English Standard Version
You shall come to your grave in ripe old age, like a sheaf gathered up in its season.New International Version
You will come to the grave in full vigor, like sheaves gathered in season.