[Machine] The Prophet said, "Verily, the worst form of interest is for a person to insult his brother. And indeed, the greatest of sins is for a person to curse another man's parents." They asked, "How can a person curse them, O Messenger of Allah?" He replied, "A person curses another, and consequently, he curses his parents."
أَنَّ النَّبِيَّ ﷺ قَالَ إِنَّ أَرْبَى الرِّبَا أَنْ يَسْتَطِيلَ الرَّجُلُ فِي شَتَمِ أَخِيهِ وَإِنَّ أَكْبَرَ الْكَبَائِرِ أَنْ يَشْتِمَ الرَّجُلُ وَالِدَيْهِ قَالُوا وَكَيْفَ يَشْتِمُهُمَا يَا رَسُولَ اللهِ؟ قَالَ يَشْتِمُ الرَّجُلَ فَيَشْتِمُهُمَا