Musnad Ahmad 937:96

Yahya ibn Sa'id narrated to us, from Yahya, Abu Salih narrated to me, from a man from Banu Asad, and Ya'la, Yahya narrated to us, from Dhakwan Abu Salih, from a man from Banu Asad, that Abu Dharr informed him, he said: The Messenger of Allah (peace and blessings of Allah be upon him) said: "The most intense of my nation in love for me are a people who will be, or will emerge, after me. One of them would wish that he had given away his family and his wealth, and that he had seen me."