´It was narrated that Sa'd said:` "I used to see the Messenger of Allah (ﷺ) saying the taslim to his right and to his left until the whiteness of his cheek could be seen."
Hadith ReferenceSunan an-Nasa'i / The Book of Forgetfulness (In Prayer) / Hadith: 1318
Hadith Gradingالألبانی:صحيح | زبیر علی زئی:صحيح مسلم