Musannaf Ibn Abi Shayba 33:1470

Waki’ narrated to us, from his father, from a man from the people of al-Sham who was known by the kunya Abu Abd Allah, who said: I came to Tawus and sought permission to see him. An old man came out to me, and I thought he was Tawus. I said, "Are you Tawus?" He said, "I am his son." I said, "If you are his son, then your father has become senile." He said, "He says that the scholar does not become senile." I said, "Seek permission for me to see your father." He sought permission for me, and I entered upon him. The old man said, "Ask, and be brief." I said, "If you are brief with me, I will be brief with you." He said, "Do not ask; I will teach you in this sitting of yours the Quran, the Torah, and the Gospel: Fear Allah with a fear such that no one is more fearful to you than Him, and hope with a hope that is stronger than your fear of Him, and love for the people what you love for yourself."