مُسْنَدُ أَحْمَدَ
Musnad Ahmad 1558
Musnad Abu Ishaq Sa'd bin Abi Waqqas
Abu ‘Abdullah al-Qarraz said: I heard Sa"d bin Malik say: I heard the Messenger of Allah (ﷺ) say: “Whoever wishes for major calamity for- or wills ill towards - the people of Madinah, Allah will cause him to melt as salt dissolves in water."
Musnad Ahmad 1558lSahih (Darussalam) [ Muslim (1387)]