Musnad Ahmad 32:1149

Yazid narrated to us, Muhammad ibn ‘Amr informed us, from Kathir ibn Khunays, from Anas ibn Malik, that he narrated to them that a man came to the Prophet, may Allah bless him and grant him peace, while he was delivering a sermon, and said: "O Messenger of Allah, when is the Hour?" He said: "And what have you prepared for the Hour?" He said: "The love of Allah and His Messenger." He said: "You are with whom you love."