(9) باب النَّهْىِ عَنْ رَفْعِ الْبَصَرِ، إِلَى السَّمَاءِ فِي الصَّلاَةِ
It was narrated from 'Ubaidullah bin Abdullah that:
A man from among the companions of the Prophet (ﷺ) told him that he heard the Messenger of Allah (ﷺ) say: 'If any one of you in praying, let him not lift his gaze to the sky, or his eyesight will be taken away.'"
Reference: Sunan an-Nasa'i 1194
In-book reference: Book 13, Hadith 16
English translation: Vol. 2, Book 13, Hadith 1195