[Bromikka]

I'm confused, why did Abu Bakr read this verse of the Quran when the Prophet died (but didn't?)

Muhammad is not but a messenger. [Other] messengers have passed on before him. So if he was to die or be killed, would you turn back on your heels [to unbelief]? And he who turns back on his heels will never harm Allah at all; but Allah will reward the grateful. What does this verse mean exactly?

Or what about this verse:

Indeed, you are to die, and indeed, they are to die. I can understand that they died a worldly life and now are alive in an next life way in the grave, but I can't understand they didn't die and are still alive in a worldly way and an next life way.


Please explain,