I used to see the Messenger of Allah (ﷺ) making Taslīm (salutation of peace ending the prayer) to his right and to his left, until I could see the whiteness of his cheek

Sa‘d ibn Abi Waqqās (may Allah be pleased with him) reported that he used to see the whiteness of the Prophet's (ﷺ) cheeks because of how much he would turn his head when making the first Taslīm to his right and the second to his left.