The Prophet ﷺ said, "There is no Tiyara and the best omen is the Fal," Somebody said, "What is the Fal, O Messenger of Allah ﷺ?" He said, "A good word that one of you hears (and takes as a good omen).
قَالَ النَّبِيُّ ﷺ لاَ طِيَرَةَ وَخَيْرُهَا الْفَأْلُ قَالَ وَمَا الْفَأْلُ يَا رَسُولَ اللَّهِ قَالَ الْكَلِمَةُ الصَّالِحَةُ يَسْمَعُهَا أَحَدُكُمْ