Musnad Ahmad 30:501

'Affan narrated to us, 'Abd al-Wahid ibn Ziyad narrated to us, Ma'mar narrated to us, from al-Zuhri, from Humayd ibn 'Abd al-Rahman, from Abu Hurayrah, who said: The Messenger of Allah (peace and blessings of Allah be upon him) said: "There is no *tiyarah* (evil omen), and the best of it is *al-fa'l* (a good omen)." And he mentioned the like of it.