Musnad Ahmad 30:970

'Abd al-Razzaq narrated to us, Ibn Jurayj informed us, 'Abd Allah ibn 'Abd al-Rahman ibn Yuhannis informed me, from Abu 'Abd Allah al-Qaraz, that he said: I bear witness to three things regarding Abu Hurayrah, that he said: Abu al-Qasim (the Prophet) said: "Whoever intends evil for the people of this town—meaning the people of Medina—Allah will melt him as salt melts in water."