Mujahid narrates: An elder who had lived in the days of Ignorance told us, while we were in the campaign of Rhodes; that gentleman's name was Sayyiduna Ibn Abs (may Allah be pleased with him). He narrates: Once I was taking my family's cow along, and meanwhile I heard a voice from its belly: "O family of Dharih! This is an eloquent saying: a man is calling out loudly that there is no god but Allah." The narrator says: We came to Makkah, and there we found that the Prophet (peace and blessings be upon him) had appeared.
Ahmad recorded it, and its narrators are thiqat (trustworthy).