Musnad Abu Ya'la al-Mawsili 117:3

'Abd al-A'la and Hawtharah narrated to us, they said: Hammad ibn Salamah narrated to us, from Thabit, from Anas, that a man said: "O Messenger of Allah, when will the Hour be established?" When the Prophet, may Allah bless him and grant him peace, finished his prayer, he said: "Where is the one who asked about the Hour?" The man said: "Here I am, O Messenger of Allah." He said: "It is being established, so what have you prepared for it?" He said: "I have not prepared much work for it, except that I love Allah and His Messenger." He said: "You are with whom you love." There was a boy from the Ansar with him who was called Muhammad. He said: "If this one lives, he will not reach old age until the Hour is established." (This is from the copy of 'Abd al-A'la).