Musnad Abu Ya'la al-Mawsili 155:151

Hanad ibn al-Sari narrated to us, 'Abdah narrated to us, from Muhammad ibn 'Amr, from Abu Salamah, from Abu Hurayrah, who said: The Messenger of Allah (ﷺ) said: "Whoever intends evil for the people of Medina, Allah will dissolve him just as salt dissolves in water."