Hadith 5753
Narrated `Abdullah bin `Umar: Allah's Apostle said, "There is neither 'Adha (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."
Hadith 5754
Narrated Abu Huraira: I heard Allah's Apostle 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).