Musnad Ahmad 408:1

Muhammad ibn Bakr al-Bursani narrated to us, he said: Ubayd Allah ibn Abi Ziyad informed us, he said: Abdullah ibn Kathir al-Dari narrated to me, from Mujahid, he said: A sheikh who lived through the Jahiliyyah narrated to us, while we were on the expedition of Rhodes, who was called Ibn 'Abs. He said: "I was driving a cow for some of our kin." He said: "Then I heard from its interior: 'O family of Dharih, a clear speech, a man crying out: There is no god but Allah.'" He said: "Then we arrived in Makkah, and we found that the Prophet had appeared in Makkah."