Mughira bin Shu'bah reported that Allah's Apostle ( صلی اللہ علیہ وسلم ) worshipped so much that his feet were swollen. It was said to him: (Why do you undergo so much hardship despite the fact that Allah has pardoned for you your earlier and later sins? Thereupon he said: May I not (prove myself) to be a grateful servant (of Allah)?

This hadith has been transmitted on the authority of Mughira bin Shu'bah and the words are: Allah's Apostle ( صلی اللہ علیہ وسلم ) kept standing in prayer (for such long hours) that his feet were swollen. They (his Companions) said: Verily, Allah has pardoned for thee the earlier and the later of thine sins. Thereupon he said: Should I not prove myself to be a grateful servant (of Allah)?

A'isha reported that when Allah's Messenger ( صلی اللہ علیہ وسلم ) occupied himself in prayer, he observed such a (long) qiyam (posture of standing in prayer) that his feet were swollen. A'isha said: Allah's Messenger you do this (in spite of the fact) that your earlier and later sins have been pardoned for you? Thereupon, he said. A'isha should I not prove myself to be a thanksgiving servant (of Allah)?