Sahih al-Bukhari, Book 76, Hadith 71 (In-Book) ⓘ
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: Hadith 5756 (DarusSalam) & Volume 7, Book 71, Hadith 652 (USC-MSA)