عَنْ أُسَامَةَ بْنِ شَرِيكٍ قَالَ: قَالُوا: يَا رَسُول الله أفنتداوى؟ قَالَ: «نعم يَا عبد اللَّهِ تَدَاوَوْا فَإِنَّ اللَّهَ لَمْ يَضَعْ دَاءً إِلَّا وَضَعَ لَهُ شِفَاءً غَيْرَ دَاءٍ وَاحِدٍ الْهَرم» . رَوَاهُ أَحْمد وَالتِّرْمِذِيّ وَأَبُو دَاوُد

He reported in mursal form that God’s messenger said

“If anyone has himself cupped or smeared with something on a Saturday or a Wednesday, he must blame no one but himself if he gets leprosy.” It is transmitted in Sharh as-sunna.