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).
Sahih al-Bukhari Book 76, Hadith 69
← Previous Hadith 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."

Sahih al-Bukhari Book 76, Hadith 68 Next Hadith → The Prophet (ﷺ) said, "There is no Tiyara and the best omen is the Fal," Somebody said, "What is the Fal, O Allah's Messenger (ﷺ)?" He said, "A good word that one of you hears (and takes as a good omen).

Sahih al-Bukhari Book 76, Hadith 70