Abu Huraira reported: The Prophet, peace and blessings be upon him, said, “There are no omens, but the best of it is optimism.” They said, “O Messenger of Allah, what is optimism?” The Prophet said, “A righteous word one of you hears.”
In another narration, the Prophet said, “I am amazed by optimism, the good word, the kind word.”
Source: Ṣaḥīḥ al-Bukhārī 5422, Ṣaḥīḥ Muslim 2223
Grade: Muttafaqun Alayhi (authenticity agreed upon) according to Al-Bukhari and Muslim
عَنْ أَبِي هُرَيْرَةَ عَنْ النَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ قَالَ لَا طِيَرَةَ وَخَيْرُهَا الْفَأْلُ قِيلَ يَا رَسُولَ اللَّهِ وَمَا الْفَأْلُ قَالَ الْكَلِمَةُ الصَّالِحَةُ يَسْمَعُهَا أَحَدُكُمْ
وفي رواية البخاري قال وَيُعْجِبُنِي الْفَأْلُ الْكَلِمَةُ الْحَسَنَةُ الْكَلِمَةُ الطَّيِّبَةُ
5422 صحيح البخاري كتاب الطب باب الطيرة
2223 صحيح مسلم كتاب السلام باب الطيرة والفأل وما يكون فيه من الشؤم