“The Messenger of Allah ﷺ said: ‘Do not lift your gaze to the heavens lest your sight be snatched away,” meaning during prayer.  

قَالَ رَسُولُ اللَّهِ ﷺ لاَ تَرْفَعُوا أَبْصَارَكُمْ إِلَى السَّمَاءِ أَنْ تَلْتَمِعَ يَعْنِي فِي الصَّلاَةِ  

“The Messenger of Allah ﷺ led his Companions in prayer one day. When he had finished prayer he turned to face the people and said: ‘What is wrong with some people that they lift their gaze to the heavens?’ He spoke severely concerning that: ‘They should certainly abstain from that or Allah will snatch away their sight.’”  

صَلَّى رَسُولُ اللَّهِ ﷺ يَوْمًا بِأَصْحَابِهِ فَلَمَّا قَضَى الصَّلاَةَ أَقْبَلَ عَلَى الْقَوْمِ بِوَجْهِهِ فَقَالَ مَا بَالُ أَقْوَامٍ يَرْفَعُونَ أَبْصَارَهُمْ إِلَى السَّمَاءِ حَتَّى اشْتَدَّ قَوْلُهُ فِي ذَلِكَ لَيَنْتَهُنَّ عَنْ ذَلِكَ أَوْ لَيَخْطَفَنَّ اللَّهُ أَبْصَارَهُمْ  

“Let those who lift their gaze to the heavens desist, or their sight will not come back.”  

أَنَّ النَّبِيَّ ﷺ قَالَ لَيَنْتَهِيَنَّ أَقْوَامٌ يَرْفَعُونَ أَبْصَارَهُمْ إِلَى السَّمَاءِ أَوْ لاَ تَرْجِعُ أَبْصَارُهُمْ  

“A woman used to perform prayer behind the Prophet ﷺ, and she was one of the most beautiful of people. Some of the people used to go into the first row so that they would not see her, and some of them used to lag behind so that they would be in the last row, and when they bowed, they would do like this so that they could see her from beneath their armpits. Then Allah revealed: “And indeed, We know the first generations of you who had passed away, and indeed, We know the present generations of you (mankind), and also those who will some afterwards.” [15:24] concerning her matter.  

كَانَتِ امْرَأَةٌ تُصَلِّي خَلْفَ النَّبِيِّ ﷺ حَسْنَاءُ مِنْ أَحْسَنِ النَّاسِ فَكَانَ بَعْضُ الْقَوْمِ يَسْتَقْدِمُ فِي الصَّفِّ الأَوَّلِ لِئَلاَّ يَرَاهَا وَيَسْتَأْخِرُ بَعْضُهُمْ حَتَّى يَكُونَ فِي الصَّفِّ الْمُؤَخَّرِ فَإِذَا رَكَعَ قَالَ هَكَذَا يَنْظُرُ مِنْ تَحْتِ إِبْطِهِ فَأَنْزَلَ اللَّهُ {وَلَقَدْ عَلِمْنَا الْمُسْتَقْدِمِينَ مِنْكُمْ وَلَقَدْ عَلِمْنَا الْمُسْتَأْخِرِينَ} فِي شَأْنِهَا