Musnad Ahmad 32:1402

'Ali ibn 'Ayyash narrated to us, Muhammad ibn Muhajir narrated to us, from 'Urwah ibn Ruwaym, who said: Anas ibn Malik came to Mu'awiyah ibn Abi Sufyan while he was in Damascus. He said: So he entered upon him, and Mu'awiyah said to him: "Narrate to me a hadith you heard from the Prophet of Allah, may Allah bless him and grant him peace, with no one between you and him regarding it." Anas said: I heard the Messenger of Allah, may Allah bless him and grant him peace, say: "Faith is Yemeni," like this, toward Lakhm and Judham.