Musnad Ahmad 32:1104

Zayd ibn al-Hubab narrated to us, he said: Husayn ibn Waqid narrated to me, he said: Thabit al-Bunani narrated to me, he said: Anas ibn Malik narrated to me, that a man said: "O Messenger of Allah, when is the Hour?" He said: "What have you prepared for it?" He said: "The love of Allah and His Messenger." He said: "You are with whom you love."