Musnad Ahmad 30:1997

Abu Ahmad narrated to us, he said: Sufyan narrated to us, from al-Hajjaj ibn Farafisah, from a man, from Abu Salamah, from Abu Hurairah, who said: The Messenger of Allah (peace and blessings of Allah be upon him) said: "Indeed, the believer is gullible and noble, and indeed, the wicked person is deceitful and base."