The Book of Greetings
وَحَدَّثَنَاهُ مُحَمَّدُ بْنُ الْمُثَنَّى، وَابْنُ، بَشَّارٍ قَالاَ أَخْبَرَنَا مُحَمَّدُ بْنُ جَعْفَرٍ، حَدَّثَنَا شُعْبَةُ، سَمِعْتُ قَتَادَةَ، يُحَدِّثُ عَنْ أَنَسِ بْنِ مَالِكٍ، عَنِ النَّبِيِّ صلى الله عليه وسلم قَالَ " لاَ عَدْوَى وَلاَ طِيَرَةَ وَيُعْجِبُنِي الْفَأْلُ " . قَالَ قِيلَ وَمَا الْفَأْلُ قَالَ " الْكَلِمَةُ الطَّيِّبَةُ " .Anas b. Malik reported Allah's Messenger (ﷺ) as saying:There is no transitive disease, no divination, but good omen pleases me. It was said: What is good omen? He said: Sacred words
From Sahih Muslim, whose reports the scholars accept as authentic.