Hazrat Abu Abdullah (may Allah have mercy on him) says that I came to Tawus (may Allah have mercy on him), then I sought permission to go to him, when a very old man came to me. I thought that this was Tawus. I asked, "Are you Tawus?" He replied, "No, I am his son." I said, "If you are his son, then your father's mind must have deteriorated." He replied, "My father says that the mind of a scholar does not deteriorate." He says, "I said to him, 'Ask your father for permission for me.'" He says, "I was granted permission." So I went to him, and he said, "Ask, and speak quickly and briefly." I said, "If you speak quickly, I will also speak briefly." He said, "Do not ask; I will teach you in this gathering the teachings of the Qur'an, the Torah, and the Gospel: Fear Allah so much that you fear none besides Him. And hope from Him more than you fear Him. And like for people what you like for yourself."