Muhammad said: It is said that a period of time (hin) is called a community (ummah) because a community of people comes to an end within a period of time.

[They will surely say, "What detains it?"] Allah, may He be exalted, says: [Unquestionably, on the day it comes to them, it will not be averted from them], meaning: no one will be able to avert it from them. [And there will encompass them] meaning: it will surround them, [what they used to ridicule], meaning: the punishment of the Hereafter, according to the interpretation of al-Kalbi.