The Book of Pilgrimage (Kitab Al-Hajj)

Muslim :: Book 7 : Hadith 3194

Abu Huraira (Allah be pleased with him) reported that Abu'I-Qasim (Mubammad, may peace be upon him) said: He who intends to do harm to the people of this city (that is, Medina). Allah would efface him as salt is dissolved in water.