عَنْ أَبِي مَسْعُودِ الْأَنْصَارِيِّ
قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «لَا تُجْزِئُ صَلَاةُ الرَّجُلِ حَتَّى يُقِيمَ ظَهْرَهُ فِي الرُّكُوعِ وَالسُّجُودِ»
Abu Masud al-Ansari reported God’s Messenger as saying, “A man’s prayer does not avail him unless he keeps his back steady when bowing and prostrating himself.” Abu Dawud, Tirmidhi, Nasai.
Mishkat al-Masabih 824, Book 5, Prayer, Hadith 302. 1 min read