أَخْبَرَنَا يَعْلَى بْنُ عُبَيْدٍ ، حَدَّثَنَا الْأَعْمَشُ ، عَنْ عُمَارَةَ هُوَ ابْنُ عُمَيْرٍ ، عَنْ أَبِي مَعْمَرٍ ، عَنْ أَبِي مَسْعُودٍ ، قَالَ : قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ :" لَا تُجْزِئُ صَلَاةٌ لَا يُقِيمُ الرَّجُلُ فِيهَا صُلْبَهُ فِي الرُّكُوعِ وَالسُّجُودِ "

Ya'la bin Ubaid told us, Al-A'mash told us, on the authority of Amara, who is Ibn Umair, on the authority of Abu Muammar, on the authority of Abu Masoud, he said: He said The Messenger of God, may God bless him and grant him peace, said: “A prayer in which a man does not straighten his cross while bowing and prostrating is not sufficient.”