Notice how emphatic that promise is: “There is going to be a resurrection ”! There is no doubt about it, for Jehovah has given his word!
إِنَّ ٱلْوَعْدَ بِٱلْقِيَامَةِ لَا شَكَّ فِيهِ لِأَنَّ يَهْوَه قَطَعَهُ .‏