When should the followers refrain from standing if the Iqamah is called while the Imam is outside the mosque or his proximity is unknown?
Chapter on the Description of Prayer
Al-Mughni
Book of Prayer
Primary text
The followers should not stand if the Iqamah is called while the Imam is outside the mosque or if they do not know his proximity. This is based on the explicit command of the Prophet (peace be upon him): 'When the prayer is established, do not stand until you see me' (Muttafaqun 'Alayh), as demonstrated when 'Ali (may Allah be pleased with him) found people standing and questioned them for staring blankly ('samidin').
Supporting text
Ahmad, in one narration, favored the narration of Abu Hurayrah indicating that the ranks were formed before the Prophet (PBUH) took his position, suggesting the formation of ranks should precede the Imam's entry if he is expected.