وَعَنِ الزُّهْرِيِّ مُرْسَلًا عَنِ
النَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «مِنْ احْتَجَمَ يَوْمَ الْأَرْبِعَاءِ أَوْ يَوْمَ السَّبْتِ فَأَصَابَهُ وَضَحٌ فَلَا يَلُومَنَّ إِلَّا نَفْسَهُ»
“If anyone has himself cupped on a Wednesday or a Saturday and is smitten by leprosy, he must blame no one but himself.” Ahmad and Abu Dawud transmitted it. It has been given an isnad, but Abu Dawud said that that is not sound.
Mishkat al-Masabih 4357, Book 24, Medicine and Spells, Hadith 37. 1 min read