Arabic (Original)
حَدَّثَنَا حُسَيْنُ بْنُ مُحَمَّدٍ حَدَّثَنَا شُعْبَةُ عَنْ سُلَيْمَانَ قَالَ سَمِعْتُ عُمَارَةَ بْنَ عُمَيْرٍ التَّيْمِيَّ يُحَدِّثُ عَنْ أَبِي مَعْمَرٍ الْأَزْدِيِّ عَنْ أَبِي مَسْعُودٍ عَنْ النَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ قَالَ لَا تُجْزِئُ صَلَاةٌ لِرَجُلٍ أَوْ لِأَحَدٍ لَا يُقِيمُ ظَهْرَهُ فِي الرُّكُوعِ وَالسُّجُودِ.
English Translation
Husayn ibn Muhammad narrated to us, he said: Shu'bah narrated to us, from Sulayman, who said: I heard Umarah ibn Umayr al-Taymi narrate from Abu Ma'mar al-Azdi, from Abu Mas'ud, from the Prophet, peace and blessings be upon him, who said, "The prayer of a man, or of anyone, who does not straighten his back in bowing and prostration, does not suffice."