Someone offers Salah while sitting on a chair because of his inability to stand
anyone who is unable to stand while offering Salah should offer it sitting, either on the ground or on a chair if it is easier. Moreover, they may offer Ruku‘ (bowing) and Sujud by gesturing in the air, and let the Sujud be lower than the Ruku‘ if they cannot offer it on the ground. However, it is impermissible for a person to offer Sujud on a table and a cushion, for the Hadith related by
Al-Bayhaqy and classed as Sahih (authentic) by
Al-Hakim on the authority of
Jabir (may Allah be pleased with him) who said:
“The Prophet (peace be upon him) visited an ill man, and he saw him offering Salah (prayer) on a cushion. The Prophet (peace be upon him) then threw it away and said: ‘Pray on the ground if you can, otherwise, make a gesture, and let your Sujud (prostration) be lower than your Ruku‘ (bowing).’”
Al-Bayhaqy and classed as Sahih by
Abu Hatim) May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.