Sahih al-Bukhari 3355
Sahih al-Bukhari · Book 60: Prophets · The Statement of Allah Taa'la: "...And Allah did take Ibrahim as a Khalil."
Narrated Mujahid:
حَدَّثَنِي بَيَانُ بْنُ عَمْرٍو ، حَدَّثَنَا النَّضْرُ ، أَخْبَرَنَا ابْنُ عَوْنٍ ، عَنْ مُجَاهِدٍ ، أَنَّهُ سَمِعَ ابْنَ عَبَّاسٍ ـ رضى الله عنهما ـ وَذَكَرُوا لَهُ الدَّجَّالَ بَيْنَ عَيْنَيْهِ مَكْتُوبٌ كَافِرٌ أَوْ ك ف ر. قَالَ لَمْ أَسْمَعْهُ وَلَكِنَّهُ قَالَ " أَمَّا إِبْرَاهِيمُ فَانْظُرُوا إِلَى صَاحِبِكُمْ، وَأَمَّا مُوسَى فَجَعْدٌ آدَمُ عَلَى جَمَلٍ أَحْمَرَ مَخْطُومٍ بِخُلْبَةٍ، كَأَنِّي أَنْظُرُ إِلَيْهِ انْحَدَرَ فِي الْوَادِي " .
That when the people mentioned before Ibn `Abbas that the Dajjal would have the word Kafir, (i.e. unbeliever) or the letters Kafir (the root of the Arabic verb 'disbelieve') written on his forehead, I heard Ibn `Abbas saying, "I did not hear this, but the Prophet (ﷺ) said, 'If you want to see Abraham, then look at your companion (i.e. the Prophet) but Moses was a curly-haired, brown man (who used to ride) a red camel, the reins of which was made of fires of date-palms. As if I were now looking down a valley."