Allah's Messenger (ﷺ) talked to his companions about his Night Journey to the Heavens. When he reached the fifth Heaven, he met Aaron. (Gabriel said to the Prophet), "This is Aaron." The Prophet (ﷺ) said, "Gabriel greeted and so did I, and he returned the greeting saying, 'Welcome, O Pious Brother and Pious Prophet."
Sahih al-Bukhari Book 60, Hadith 67
← Previous Hadith The Prophet (ﷺ) returned to Khadija while his heart was beating rapidly. She took him to Waraqa bin Naufal who was a Christian convert and used to read the Gospels in Arabic Waraqa asked (the Prophet), "What do you see?" When he told him, Waraqa said, "That is the same angel whom Allah sent to the Prophet) Moses. Should I live till you receive the Divine Message, I will support you strongly."

Sahih al-Bukhari Book 60, Hadith 66 Next Hadith → Allah's Messenger (ﷺ) said, "On the night of my Ascension to Heaven, I saw (the prophet) Moses who was a thin person with lank hair, looking like one of the men of the tribe of Shanua; and I saw Jesus who was of average height with red face as if he had just come out of a bathroom. And I resemble prophet Abraham more than any of his offspring does. Then I was given two cups, one containing milk and the other wine. Gabriel said, 'Drink whichever you like.' I took the milk and drank it. Gabriel said, 'You have accepted what is natural, (True Religion i.e. Islam) and if you had taken the wine, your followers would have gone astray.' "

Sahih al-Bukhari Book 60, Hadith 68