Musnad Abu Ya'la al-Mawsili 118:22

Muhammad ibn 'Abbad narrated to us, Sufyan narrated to us, from al-Zuhri, from Anas, that a man asked the Messenger of Allah (may Allah bless him and grant him peace) about the Hour. The Prophet (may Allah bless him and grant him peace) said to him, "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, "A person is with whom he loves."