وَعَنِ ابْنِ عَبَّاسٍ رَضِيَ اللَّهُ عَنْهُمَا
قَالَ: إِنَّ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ كَانَ يَلْحَظُ فِي الصَّلَاةِ يَمِينًا وَشِمَالًا وَلَا يَلْوِي عُنُقَهُ خَلْفَ ظَهْرِهِ
God’s Messenger used to glance right and left during prayer but did not turn his neck to look behind him. Tirmidhi and Nasai transmitted it.
Mishkat al-Masabih 940, Book 5, Prayer, Hadith 418. 1 min read