Sayyiduna Abdullah bin Mu'awiyah (may Allah be pleased with him) narrates: "I saw the Messenger of Allah (peace and blessings be upon him) giving the salam to his right and to his left, until the whiteness of his (peace and blessings be upon him) cheeks could be seen."
Imam al-Tabarani (may Allah have mercy on him) said: "No one narrated this hadith from al-Hakam except Abu Khalid al-Dalani, and Abd al-Salam bin Harb is alone in it."