Sahih Muslim
Sahih Muslim 1387 a
The prohibition of wishing ill towards the people of Al-Madinah, and that the one who wishes them ill will be caused to melt by Allah
Arabic hadith text
حَدَّثَنَا قُتَيْبَةُ بْنُ سَعِيدٍ، حَدَّثَنَا حَاتِمٌ، - يَعْنِي ابْنَ إِسْمَاعِيلَ - عَنْ عُمَرَ بْنِ نُبَيْهٍ، أَخْبَرَنِي دِينَارٌ الْقَرَّاظُ، قَالَ سَمِعْتُ سَعْدَ بْنَ أَبِي وَقَّاصٍ، يَقُولُ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم "مَنْ أَرَادَ أَهْلَ الْمَدِينَةِ بِسُوءٍ أَذَابَهُ اللَّهُ كَمَا يَذُوبُ الْمِلْحُ فِي الْمَاءِ " .
Translation
Sa'd b. Abu Waqqas reported Allah's Messenger (ﷺ) as saying
He who intends to do harm to the people of Medina, Allah would efface him just as water dissolves salt.