Sayyiduna Abu Mas’ud (may Allah be pleased with him) reports that the Messenger of Allah (peace and blessings be upon him) said: “The prayer of the one who does not straighten his back in bowing and prostration is not sufficient.”
Sayyiduna Abu Mas’ud (may Allah be pleased with him) reports that the Messenger of Allah (peace and blessings be upon him) said: “The prayer of the one who does not straighten his back in bowing and prostration is not sufficient.”
Sayyiduna Abu Mas’ud (may Allah be pleased with him) reports that the Messenger of Allah (peace and blessings be upon him) said: “The prayer of a person or a man is not sufficient who does not straighten his back equally in bowing (ruku’) and prostration (sujud).” The Imam narrates this in a similar manner from his teacher, Bishr bin Khalid ‘Askari, with the same chain. He has stated these words: “(Who) does not straighten his back in bowing and prostration.”
Hazrat Abdur Rahman bin Ali bin Shaiban narrates from his respected father, Sayyiduna Ali bin Shaiban (may Allah be pleased with him), that he was a member of the delegation (that came to the service of the Noble Prophet, peace and blessings be upon him). He says: We performed prayer behind the Noble Prophet (peace and blessings be upon him), and he glanced with the corner of his eye at a man who was not straightening his back in bowing (ruku) and prostration (sujud). Then, when the Messenger of Allah (peace and blessings be upon him) completed the prayer, he said: "O assembly of Muslims, indeed the prayer of the one who does not straighten his back in bowing and prostration is not valid." This is the hadith of Ahmad bin al-Muqaddam.