I heard the Prophet ﷺ say, "There is no evil omen, and the best of it is the good omen."Someone asked, "Messenger of Allah, what is the good omen?"He replied, "A wholesome word that one of you hears."
سمعت النبي ﷺ يقول: لا طيرة وخيرها الفأل قيل: يا رسول الله وما الفأل؟ قال: الكلمة الصالحة يسمعها أحدكم.
Bukhari narrated it in the Book of Medicine (5754, 5755), and Muslim in the Book of Greetings (2223), both through routes from Zuhri, who said, "Ubaydullah bin Abdullah bin Utba informed me that Abu Hurairah said, 'I heard the Prophet ﷺ say,'" then he mentioned it.