Arabic (Original)
حَدَّثَنَا يَعْقُوبُ حَدَّثَنَا أَبِي عَنْ أَبِيهِ عَنْ حُمَيْدِ بْنِ عَبْدِ الرَّحْمَنِ سَمِعْتُ عَبْدَ اللَّهِ بْنَ عَمْرٍو يَقُولُ قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ إِنَّ مِنْ أَكْبَرِ الْكَبَائِرِ أَنْ يَلْعَنَ الرَّجُلُ وَالِدَيْهِ قَالُوا يَا رَسُولَ اللَّهِ وَكَيْفَ يَلْعَنُ الرَّجُلُ أَبَوَيْهِ قَالَ يَسُبُّ الرَّجُلُ الرَّجُلَ فَيَسُبُّ أَبَاهُ وَيَسُبُّ الرَّجُلُ أُمَّهُ فَيَسُبُّ أُمَّهُ.
English Translation
Ya'qub told us: my father told us, from his father, from Humayd ibn Abd al-Rahman: I heard Abdullah ibn Amr say: The Messenger of Allah, peace and blessings be upon him, said: Among the greatest of major sins is that a man curse his own parents. They said: O Messenger of Allah, how does a man curse his own parents? He said: A man curses another man's father, so the other curses his father in return, and a man curses another man's mother, so the other curses his mother in return.