an excuse (1). Likewise, even if all the inhabitants of a city missed it (2), they would not perform it (3) on Saturday.
As for the five daily prayers, it is established that a person with a valid excuse performs them when able. The Prophet—may Allah bless him and grant him peace—said:
“Whoever sleeps through a prayer or forgets it must perform it when he remembers it, for that is its time. There is no expiation for it other than this.” (4)
Likewise, regarding the fast of Ramadan, Allah commanded the traveler, the sick person, and the menstruating woman to fast (5) an equivalent number of other days.
The period shared by Zuhr and Asr, and by Maghrib and Ishā, is a time (6) in which both prayers may lawfully be performed (7) when there is an excuse. If they are performed without an excuse, the person who does so is sinful; nevertheless, the prayer has been performed at a time that is, broadly speaking, its time.
The Prophet—may Allah bless him and grant him peace—commanded that prayer be performed behind rulers who delayed the prayer, and he prohibited fighting them, despite censuring them and their wrongdoing. Those rulers used to delay Zuhr until the time of Asr. Then a group of the Shi'a (8) arose and began habitually combining the two prayers during the time of the first, without any excuse. The shared time thus accommodates considerations that do not apply when the prescribed time is missed altogether: permission to combine because of an excuse, the rulers’ interpretive judgment, and the validity of the prayer despite the sin incurred by delaying it. An absolute lapse is like that of a person who deliberately does not fast during Ramadan and says, “I shall fast in Shawwāl,” or who postpones Zuhr and Asr