Narrated `Abdullah bin `Umar
Allah's Messenger (ﷺ) said, "There is neither 'Adwa (no contagious disease is conveyed to others without Allah's permission) nor Tiyara, but an evil omen may be in three a woman, a house or an animal."
Narrated Abu Huraira
I heard Allah's Messenger (ﷺ) saying, "There is no Tiyara, and the best omen is the Fal." They asked, "What is the Fal?" He said, "A good word that one of you hears (and takes as a good omen).