Musnad Ahmad 32:135

Sufyan narrated to us, from al-Zuhri, from Anas, that a man asked the Prophet, peace and blessings of Allah be upon him, about the Hour. He said: "What have you prepared for it?" He said: "I have not prepared anything for it" — and Sufyan said once: "I have not prepared much for it" — "but I love Allah and His Messenger." He said: "A person is with whom he loves." And Sufyan said another time: "You are with whom you loved."