Sayyiduna Anas bin Malik (may Allah be pleased with him) narrates that the Noble Prophet (peace and blessings be upon him) entered the mosque and saw a rope tied between two pillars. He inquired, "What is this rope?" The people replied, "It has been tied by Sayyidah Zainab (may Allah be pleased with her); when she becomes tired (while standing in prayer), she hangs onto it." The Noble Prophet (peace and blessings be upon him) said, "No, this rope should not be here; untie it. Each of you should pray as long as he feels inclined, and when he becomes tired, he should sit down."

Lady Aisha (may Allah be pleased with her) narrates that the Messenger of Allah (peace and blessings be upon him) came to me (one day) when a woman was sitting with me. He inquired, "Who is this?" I replied, "So-and-so woman," and mentioned her enthusiasm and regularity in prayer. He said, "Wait (listen), only as much action is obligatory upon you as you have the strength for. By Allah, Allah does not get tired (of giving reward), but you will get tired (of performing deeds). And the deed most beloved to Allah in religion is that which is done consistently (and a person performs it without getting weary)."

It is narrated from Sayyidah Aisha (may Allah be pleased with her) that the Messenger of Allah (peace and blessings be upon him) said: "When any one of you feels drowsy while praying, he should sleep until the sleepiness leaves him. For when any one of you prays while drowsy, he does not know whether he is seeking forgiveness from Allah or cursing himself."