I heard Messenger of Allah 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). (Using translation from Bukhārī 5754)
قَالَ رَسُولُ اللهِ ﷺ لَا طِيَرَةَ وَخَيْرُهَا الْفَأْلُ قَالُوا يَا رَسُولَ اللهِ وَمَا الْفَأْلُ؟ قَالَ الْكَلِمَةُ الصَّالِحَةُ يَسْمَعُهَا أَحَدُكُمْ