Sayyiduna Ibn Mas'ud (may Allah be pleased with him) said: Whatever things I have forgotten, I have forgotten, but I have not forgotten this: that the Prophet (peace and blessings of Allah be upon him), at the end of the prayer, would turn to the right and to the left saying "As-salamu 'alaykum wa rahmatullah" until the whiteness of his cheeks would be visible.
Hadith Referenceمسند احمد / مسند المكثرين من الصحابة / 3702
Hadith Gradingحکم دارالسلام:حديث صحيح، وهذا إسناد ضعيف لضعف جابر الجعفي.