Assalamualaikum
. In kitaabut tahaarah publish by young man’s Muslim association at the end of ‘ paring of nails and the removal of unwanted hair ‘ a hadith is mention – do not bath (or make wudhu) with water heated in the sun, for it causes leprosy. Hadith. I would like to know in which book of hadith it is mentioned and if it is sahi as some people say it is not proven to be hadith.