[Machine] The Messenger of Allah ﷺ said, "Allah does not regard the prayer of a servant who does not straighten their back between the bowing and prostrating."  

قَالَ رَسُولُ اللهِ ﷺ لَا يَنْظُرُ اللهُ ﷻ إِلَى صَلَاةِ عَبْدٍ لَا يُقِيمُ فِيهَا صُلْبَهُ بَيْنَ رُكُوعِهَا وَسُجُودِهَا  

[Machine] He heard the Prophet ﷺ say, "Allah does not look at the prayer of a servant who does not straighten his backbone between the bowing and prostration."  

أَنَّهُ سَمِعَ النَّبِيَّ ﷺ يَقُولُ لَا يَنْظُرُ اللهُ إِلَى صَلَاةِ عَبْدٍ لَا يُقِيمُ صُلْبَهُ بَيْنَ رُكُوعِهِ وَسُجُودِهِ  

[Machine] I heard the Messenger of Allah ﷺ say, "Allah does not look at the prayer of a servant who does not straighten his back during his bowing and prostration."  

سَمِعْتُ رَسُولَ اللهِ ﷺ يَقُولُ «لَا يَنْظُرُ اللهُ إِلَى صَلَاةِ عَبْدٍ لَا يُقِيمُ ظَهْرَهُ فِي رُكُوعِهِ وَسُجُودِهِ»  

"لَا يَنْظُرُ الله إِلَى صَلَاةِ عَبْدٍ لَا يُقيمُ صُلْبَهُ بَينَ رُكُوعِهِ وسُجُودِهِ".  

"لَا يَنْظُرُ الله إِلَى رَجُلٍ لَا يُقِيمُ صُلبَهُ بَينَ رُكُوعِهِ وَسُجُودِهِ".