The Messenger of Allah ﷺ said: The people who lift their eyes towards the sky in Prayer should avoid it or they would lose their eyesight.  

قَالَ رَسُولُ اللَّهِ ﷺ لَيَنْتَهِيَنَّ أَقْوَامٌ يَرْفَعُونَ أَبْصَارَهُمْ إِلَى السَّمَاءِ فِي الصَّلاَةِ أَوْ لاَ تَرْجِعُ إِلَيْهِمْ  

People should avoid lifting their eyes towards the sky while supplicating in prayer, otherwise their eyes would be snatched away.  

أَنَّ رَسُولَ اللَّهِ ﷺ قَالَ لَيَنْتَهِيَنَّ أَقْوَامٌ عَنْ رَفْعِهِمْ أَبْصَارَهُمْ عِنْدَ الدُّعَاءِ فِي الصَّلاَةِ إِلَى السَّمَاءِ أَوْ لَتُخْطَفَنَّ أَبْصَارُهُمْ