Excerpts from "The Sealed Nectar"
When Allah's Messenger Sallallahu Alaihi wa sallam was 12 years old - - and they say plus two months in 10 days-- he went with his uncle Abu Talib on a trade journey to Syria.
When they reached Busra (which was a part of Syria, in the vicinity of Hawran under the Roman domain), there was a monk named Bahirah (they say his name was Georges), who came out to meet them. Although he had not met them before, he easily recognised the Prophet Sallallahu Alaihi Wasallam and said while taking his hand: "This is the master of all humans. Allah will send him with a Message which will be a mercy to all beings." Abu Talib asked: "How do you know that?" He replied: "When you appeared from the direction of 'Aqabah, all the stones and trees prostrated themselves, which they never do except for a Prophet. I can also recognise him by the seal of Prophethood which is below his shoulder, like an Apple. We have found this in our books." He also asked Abu Talib to send the boy back to Makkah and not to take him to Syria for fear of the Romans and Jews. Abu Talib obeyed and sent him back to Makkah with some of his male servants.