Messenger of Allah, 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.  

دَخَلَ عَلَى رَسُولِ اللَّهِ ﷺ 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