Sunan an-Nasa'i 1325

Ibrahim ibn Ya‘qub informed us; he said: ‘Ali ibn al-Hasan ibn Shaqiq narrated to us; he said: al-Husayn ibn Waqid informed us; he said: Abu Ishaq narrated to us, from ‘Alqamah, al-Aswad, and Abu al-Ahwas, who said: ‘Abdullah ibn Mas‘ud narrated to us that the Messenger of Allah (peace and blessings be upon him) would say the salutation to his right: “Peace be upon you, and the mercy of Allah,” until the whiteness of his right cheek could be seen; and to his left: “Peace be upon you, and the mercy of Allah,” until the whiteness of his left cheek could be seen.