‘Aisha reported that when Allah’s Messenger (may peace be upon him) occupied himself in prayer, he observed such a (long) qiylm (posture of standing in prayer) that his feet were swollen. ‘Aisha 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. ‘Aisha should I not prove myself to be a thanksgiving servant (of Allah)?
Chapter : The doing of good deeds very frequently and putting one’s best efforts in devotion to Allah.