40:59Ghafir

The (Last) Hour shall not came till the sun rises from the place of its setting And on the day when it rises from the place of its setting even if all the people together affirmed their faith, it would not be of any avail to one who did not believe previously and derived no good out of his belief.

The last hour will not come before rising of the sun in its place of setting. When it rises (there) and the people see it, those who are on it (the earth) will believe. This is the time of which the Qur’anic verse says: “. . .no good will it do to a soul to believe in them then, if it believed not before nor earned righteousness through its faith."

Allah's Messenger (ﷺ) said, "The Hour will not be established till the sun rises from the west, and when it rises (from the west) and the people see it, then all of them will believe (in Allah). But that will be the time when 'No good it will do to a soul to believe then. If it believed not before.."' (6.158) The Hour will be established (so suddenly) that two persons spreading a garment between them will not be able to finish their bargain, nor will they be able to fold it up. The Hour will be established while a man is carrying the milk of his she-camel, but cannot drink it; and the Hour will be established when someone is not able to prepare the tank to water his livestock from it; and the Hour will be established when some of you has raised his food to his mouth but cannot eat it."

Allah's Messenger (ﷺ) said, "The Hour will not be established until the sun rises from the West: and when the people see it, then whoever will be living on the surface of the earth will have faith, and that is (the time) when no good will it do to a soul to believe then, if it believed not before." (6.158)

The Last Hour would come (so sudden) that a person would be milking the she- camel and the (milk) would not reach the brim of the vessel that the Last Hour would come, and the two persons would be engaged in buying and selling of the clothes and their bargain would not be struck before the Last Hour would come. And someone would be setting his tank in order and he would have hardly set it right when the Last Hour would come.