Sahih al-Bukhari, Hadith 5756 ⓘ
Narrated Anas: The Prophet said, "No 'Adha (no contagious disease is conveyed to others without Allah's permission), nor Tiyara, but I like the good Fal, i.e., the good word."
حَدَّثَنَا مُسْلِمُ بْنُ إِبْرَاهِيمَ، حَدَّثَنَا هِشَامٌ، عَنْ قَتَادَةَ، عَنْ أَنَسٍ ـ رضى الله عنه ـ عَنِ النَّبِيِّ صلى الله عليه وسلم قَالَ " لاَ عَدْوَى وَلاَ طِيَرَةَ، وَيُعْجِبُنِي الْفَأْلُ الصَّالِحُ، الْكَلِمَةُ الْحَسَنَةُ " .
also referenced under: Book 76, Hadith 71 (In-Book) & Volume 7, Book 71, Hadith 652 (USC-MSA)