Musnad Ahmad 25:643

Muhammad ibn Abi ‘Adi narrated to us, from Ibn ‘Awn, from Mujahid, who said: We were with Ibn ‘Abbas, and they mentioned the Dajjal. They said: "It is written between his eyes: K-F-R." He said: "What are you saying?" They said: "They say: It is written between his eyes: K-F-R." Ibn ‘Abbas said: "I did not hear that, but he [the Prophet] said: 'As for Ibrahim, peace be upon him, then look at your companion [the Prophet Muhammad]. And as for Musa, peace be upon him, he was a dark-skinned man with curly hair, upon a red camel, bridled with a rope of palm fiber, as if I am looking at him now as he descends into the valley, reciting the Talbiyah.'"