Sayyiduna Ibn Mas'ud (may Allah be pleased with him) narrates that the Prophet (peace and blessings be upon him) would turn to the right and to the left in such a manner while saying salam that the whiteness of his blessed cheeks would become visible.
Hadith Referenceمسند احمد / مسند المكثرين من الصحابة / 3933
Hadith Gradingحکم دارالسلام:حديث صحيح، وهذا إسناد ضعيف لضعف ابن لهيعة.