(11) باب الرُّخْصَةِ فِي الاِلْتِفَاتِ فِي الصَّلاَةِ يَمِينًا وَشِمَالاً
It was narrated that Ibn 'Abbas said:
"The Messenger of Allah (ﷺ) used to turn to his right and left when praying, but he did not twist his neck to look behind him." (ID)
Reference (ID): Sunan an-Nasa'i 1201 (ID)
In-book reference (ID): Book 13, Hadith 23 (ID)
English translation (ID): Vol. 2, Book 13, Hadith 1202 (ID)