One of the companions of Imam Reza (a.s) narrated that once when one of the servants of Imam Reza (a.s) escaped to Egypt, one of the people of Medina who was in Egypt recognized him and arrested him. He brought him back to Medina. They got to the house of Imam Reza (a.s) at night. Then the Imam (a.s) went to see him. When the servant moved to greet the Imam (a.s), Imam Reza (a.s) heard the sound of the chains with which he was placed under arrest. The Imam asked him who he was. The man from Medina said that he was the servant who had escaped. The Imam told the servant