what should the people behind the imam of the masjid do if the imam opens the prayers sitting, due to some problem in his legs?
Answer:
In Islam the people behind the imam has to fallow the imam in every respect that is, if the imam opens the prayers sitting down the people behind him has to sit down and follow imam.As Allah’s apostle says:
Narrated Anas bin Malik Al-Ansari: Allah's Apostle rode a horse and fell down and the right side of his body was injured. On that day he prayed one of the prayers sitting and we also prayed behind him sitting. When the Prophet finished the prayer with Taslim, he said, "The Imam is to be followed and if he prays standing then pray standing, and bow when he bows, and raise your heads when he raises his head; prostrate when he prostrates; and if he says "Sami'a-l-lahu Liman hamida", you should say, "Rabbana wa-laka-l hamd.: sahih al-bukhari (Volume 1, Book 12, Number 699: )
In another hadith Allah’s apostle says:
Narrated Anas bin Malik: Allah's Apostle fell from a horse and got injured so he led the prayer sitting and we also prayed sitting. When he completed the prayer he said, "The Imam is to be followed; if he says Takbir then say Takbir, bow if he bows; raise your heads when he raises his head, when he says, 'Sami' a-l-lahu Liman hamida say, 'Rabbana laka-l-hamd', and prostrate when he prostrates." sahih al-bukhari( Volume 1, Book 12, Number 700:)
In another hadith Allah’s apostle says:
Narrated Abu Huraira: The Prophet said, "The Imam is to be followed. Say the Takbir when he says it; bow if he bows; if he says 'Sami a-l-lahu Liman hamida', say, ' Rabbana wa-laka-l-hamd', prostrate if he prostrates and pray sitting altogether if he prays sitting." sahih al-bukhari(Volume 1, Book 12, Number 701:)
So The Imam is to be followed Allah knows the best
