Allah's Messenger (ﷺ) said, "Two persons came to me at night (in dream) (and took me along with them). We passed by a tall man who was so tall that I was not able to see his head and that person was Abraham."
Sahih al-Bukhari Book 60, Hadith 29
← Previous Hadith The people said, "O Allah's Messenger (ﷺ)! Who is the most honorable amongst the people (in Allah's Sight)?" He said, "The most righteous amongst them." They said, "We do not ask you, about this. " He said, "Then Joseph, Allah's Prophet, the son of Allah's Prophet, The son of Allah's Prophet the son of Allah's Khalil (i.e. Abraham)." They said, "We do not want to ask about this," He said' "Then you want to ask about the descent of the Arabs. Those who were the best in the pre-lslamic period of ignorance will be the best in Islam provided they comprehend the religious knowledge."

Sahih al-Bukhari Book 60, Hadith 28 Next Hadith → 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."

Sahih al-Bukhari Book 60, Hadith 30