“Once when Amir al-Mu’minin (a.s.) was on the pulpit a serpent entered from one of the doors of the mosque. People wanted to kill him. Amir al-Mu’minin (a.s.) asked them to leave him alone. They left him alone. The serpent began to crawl to the pulpit. He stretched and saluted to Amir al-Mu’minin (a.s.). Amir al-Mu’minin (a.s.) made a gesture to him to wait until the sermon is completed. When the sermon was completed he came to him and said, “Who are you?” He said, “I am ‘Amr ibn ‘Uthman, your deputy among the Jinns. My father has died and he has asked me in his will to come to you and find out your instructions and that is why I am here. What do you command me to do and what do you see.” Amir al-Mu’minin (a.s.) said, “I ask you to be pious before Allah and go back and act as the successor of your father among the Jinns. I appoint you as my deputy over them.” The narrator has said that ‘Amr then said farewell to Amir al-Mu’minin (a.s.) and left as his deputy over the Jinns. I asked The Imam (a.s.), may Allah take my soul in service for your cause, does ‘Amr fulfill that obligation on him?” He said, “Yes, he does so.”