Sunan an-Nasa'i, Book 50, Hadith 66 (In-Book) ⓘ

It was narrated from Anas that: The Prophet [SAW] used to say: "Allahumma inni a'udhu bika minal-jununi wal-jadhami, wal-barasi wa sayy'il-asqam (O Allah, I seek refuge in You from possession, leprosy, leukederma and bad sickness (that may lead to visible deformity)."

أَخْبَرَنَا مُحَمَّدُ بْنُ الْمُثَنَّى، قَالَ حَدَّثَنَا أَبُو دَاوُدَ، قَالَ حَدَّثَنَا هَمَّامٌ، عَنْ قَتَادَةَ، عَنْ أَنَسٍ، أَنَّ النَّبِيَّ صلى الله عليه وسلم كَانَ يَقُولُ ‏ "‏ اللَّهُمَّ إِنِّي أَعُوذُ بِكَ مِنَ الْجُنُونِ وَالْجُذَامِ وَالْبَرَصِ وَسَيِّيءِ الأَسْقَامِ ‏" ‏ ‏.‏