Musnad Ahmad 30:3659

Wahb ibn Jarir narrated to us, my father narrated to us, he said: I heard al-Nu’man ibn Rashid narrating from al-Zuhri, from ‘Ubayd Allah ibn ‘Abd Allah, from Abu Hurayrah, that the Messenger of Allah (may Allah bless him and grant him peace) said: "There is no *tiyarah* (evil omen), and the best of it is *al-fa’l* (a good omen)." It was said: "And what is *al-fa’l*?" He said: "The righteous word that one of you hears."