Musannaf Ibn Abi Shaybah

Abu Bakr bin Abi Musa narrates that Hazrat Abu Musa said: Abu Talib set out towards Syria and the Messenger of Allah (peace be upon him) went with him, along with some elders of the Quraysh. When they reached near the monk, they untied their saddlebags. The monk came to them, and before this, whenever they passed by him, he neither came out to them nor paid attention to them. So, while they were opening their saddlebags, he came through their midst and took hold of the hand of the Messenger of Allah (peace be upon him) and said: "This is the chief of the worlds, this is the Messenger of the Lord of the worlds, Allah will send him as a mercy for all the worlds." The elders of the Quraysh asked him: "How do you know this?" He said: "When you ascended the pass, there was not a single stone or tree that did not fall in prostration, and these things do not prostrate except to a prophet."