A'isha reported that two persons visited Allah's Messenger (ﷺ) and both of them talked about a thing, of which I am not aware, but that annoyed him and he invoked curse upon both of them and hurled malediction, and when they went out I said:Allah's Messenger, the good would reach everyone but it would not reach these two. He said: Why so? I said: Because you have invoked curse and hurled malediction upon both of them. He said: Don't you know that I have made condition with my Lord saying thus: O Allah, I am a human being and that for a Muslim upon whom I invoke curse or hurl malediction make it a source of purity and reward.
حَدَّثَنَا زُهَيْرُ بْنُ حَرْبٍ، حَدَّثَنَا جَرِيرٌ، عَنِ الأَعْمَشِ، عَنْ أَبِي الضُّحَى، عَنْ مَسْرُوقٍ، عَنْ عَائِشَةَ، قَالَتْ دَخَلَ عَلَى رَسُولِ اللَّهِ صلى الله عليه وسلم رَجُلاَنِ فَكَلَّمَاهُ بِشَىْءٍ لاَ أَدْرِي مَا هُوَ فَأَغْضَبَاهُ فَلَعَنَهُمَا وَسَبَّهُمَا فَلَمَّا خَرَجَا قُلْتُ يَا رَسُولَ اللَّهِ مَنْ أَصَابَ مِنَ الْخَيْرِ شَيْئًا مَا أَصَابَهُ هَذَانِ قَالَ " وَمَا ذَاكِ " . قَالَتْ قُلْتُ لَعَنْتَهُمَا وَسَبَبْتَهُمَا قَالَ " أَوَمَا عَلِمْتِ مَا شَارَطْتُ عَلَيْهِ رَبِّي قُلْتُ اللَّهُمَّ إِنَّمَا أَنَا بَشَرٌ فَأَىُّ الْمُسْلِمِينَ لَعَنْتُهُ أَوْ سَبَبْتُهُ فَاجْعَلْهُ لَهُ زَكَاةً وَأَجْرًا " .
Muslim
The Book of Virtue, Enjoining Good Manners, and Joining of the Ties of Kinship • Hadith 112