Sayyiduna Salman al-Khayr (may Allah be pleased with him) narrated: I was a man from Jayy, which is a town of Isfahan. One day it happened that Allah put into my heart (the question of) the truth about the heavens and the earth. I went to a man who was reluctant to speak to people (about religious matters). I asked him: Which religion is the best? He said: What have you to do with this matter? Do you want a religion other than the religion of your father? I said: No, but I want to know who the Lord of the heavens and the earth is, and which religion is the best. He said: I do not know of anyone (with knowledge) of this except a monk in Mosul.
So I went to him and began living with him. I saw that he was in straitened circumstances in this world; he would fast by day and stand in prayer by night. I too began to worship as he did. I stayed with him for three years, then he passed away. I asked: To whom do you entrust me? He said: I do not know of anyone in the east who is on the way I am on; go to a monk beyond al-Jazirah and convey my salam to him.
So I went to him, conveyed the salam to him and told him that he (the first one) had passed away. I stayed with him too for three years, then he too passed away. I asked: To whom do you command me to go? He said: I do not know of anyone on earth who is on the way I am on, except an old monk in Ammuriyah, and I do not know whether you will be able to reach him or not.
So I went to him and began living with him, and I saw that he was a man of ample means. When the time of his death came, I said to him: Where do you command me to go? He said: I do not know of anyone on earth who is on the way I am on. But if you reach the time in which word is heard of a man who will appear from the house of Ibrahim (peace be upon him) - and I do not think that you will reach him, although I had hoped that I would reach him - then if you are able to be with him, do so, for he will be upon the true religion. His sign is that his people will say: A sorcerer, a madman, a soothsayer; and that he will eat from a gift but will not eat from charity; and that near the cartilage of his two shoulders will be the Seal of Prophethood.
Meanwhile a caravan came from the direction of Madinah. I asked: Who are you? They said: We are from the people of Madinah. We are a people of merchants who live by our trade. But a man has appeared from the house of Ibrahim (peace be upon him) and has come to us, and his people are fighting him, and we feared that he would come between us and our trade; but he has taken control of Madinah. I asked: What do they say about him? They said: They say: A sorcerer, a madman, a soothsayer. I said: This is the very sign. Show me (the way to) your master.
So I went to him (the head of the caravan) and said: Will you take me to Madinah? He said: What will you give me? I said: I have nothing to give you, except that I become your slave. So he took me along. When I arrived (in Madinah), he put me to work in his date orchard. I would draw (water) and irrigate like a camel until my back and chest became sore from this work, and I found no one who could understand my language, until an old Persian woman came to draw water. I spoke to her and she understood what I said. I asked her: Where is the man who has appeared? Tell me where he is. She said: He will pass by you early in the morning, after he has prayed the dawn prayer.
So I went out and gathered some dates, and when morning came I came and presented the dates to him (peace and blessings be upon him). He (peace and blessings be upon him) said: "What is this, charity or a gift?" I indicated that it was charity. He (peace and blessings be upon him) said: "Take it to these people" - his companions were with him - so they ate, and he did not eat. I said: This is a sign. When the next day came, I came with dates. He (peace and blessings be upon him) said: "What is this?" I said: This is a gift. He (peace and blessings be upon him) ate and called his companions, and they ate too. Then he (peace and blessings be upon him) saw me trying to look at the seal, so he understood and removed his cloak. I began to turn it over and look at it and to cling to it. He (peace and blessings be upon him) said: "What is the matter with you?" So he (peace and blessings be upon him) asked me and I told him my story. He (peace and blessings be upon him) said: "You agreed with them that you would be a slave; buy yourself from them." So the Prophet (peace and blessings be upon him) bought him on the condition that he would bring them a hundred date palms and forty uqiyah of gold, and then he would be free. The Prophet (peace and blessings be upon him) said: "Plant the saplings," so he planted them. "Then go and lower the bucket into the well, and do not lift it until it rises by itself, for when it is full it will rise by itself; then sprinkle it on the roots (of the date palms)." So he did so, and the date palms grew in the quickest way. Then (an onlooker) said: Subhan Allah (Glory be to Allah)! We have never seen anyone like this slave; this slave has a special standing. So the people gathered around him. The Prophet (peace and blessings be upon him) gave him gold, in which there were forty uqiyah.
Hadith Referenceالمعجم الكبير للطبراني / باب السين / 6051