The Messenger of Allah ﷺ would give the salam to his right until the whiteness of his cheek became visible, saying, "Peace and mercy of Allah be upon you," and to his left until the whiteness of his cheek became visible, saying, "Peace and mercy of Allah be upon you."
حدثنا عمر بن عبيد عن أبي إسحاق عن أبي الأحوص
كان رسول الله ﷺ يسلم عن يمينه حتى يبدو بياض خده يقول السلام عليكم ورحمة الله وعن يساره حتى يبدو بياض خده يقول السلام عليكم ورحمة الله