Hadith 1276

It was narrated from Abu Hurairah that: The Messenger of Allah (SAW) said: "People should certainly stop lifting their gaze to the sky when they supplicate during the prayer, or they will lose their eyesight."

أَخْبَرَنَا أَحْمَدُ بْنُ عَمْرِو بْنِ السَّرْحِ، عَنِ ابْنِ وَهْبٍ، قَالَ أَخْبَرَنِي اللَّيْثُ، عَنْ جَعْفَرِ بْنِ رَبِيعَةَ، عَنِ الأَعْرَجِ، عَنْ أَبِي هُرَيْرَةَ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ ‏"‏ لَيَنْتَهِيَنَّ أَقْوَامٌ عَنْ رَفْعِ أَبْصَارِهِمْ عِنْدَ الدُّعَاءِ فِي الصَّلاَةِ إِلَى السَّمَاءِ أَوْ لَتُخْطَفَنَّ أَبْصَارُهُمْ ‏"‏ ‏.‏

Reference: 1112810
In-book reference: Book 13, Hadith 1276
Hadith 1276 - The Book of Forgetfulness (In Prayer) - Sunan an-Nasa'i - Sunnah.com