Musnad Ahmad 333:25

'Abd al-Samad narrated to us, he said: 'Umar ibn Rashid al-Yamami narrated to us, he said: Iyas ibn Salamah ibn al-Akwa' narrated to us, from his father, that the Messenger of Allah, peace and blessings of Allah be upon him, said: "Aslam, may Allah grant it peace (salam), and Ghifar, may Allah forgive it (ghafara). As for by Allah, it is not I who said it, but Allah who said it."