The tradition mentioned above has also been transmitted by Sahl bin Sa’d Al Sa’idi through a different chain of narrators. This version has “He divorced her three times before the Messenger of Allah ﷺ. The Messenger of Allah ﷺ implemented it and what is done before the Prophet ﷺ is sunnah(model behavior of the Prophet). Sahl said “I attended this before the Messenger of Allah ﷺ. Afterwards the sunnah about those who invoked curses on each other was established that they (the spouses) were separated from each other and they would never be united.” (Using translation from Abū Dāʾūd 2250)   

«أَنَّ الْمُلَاعِنَ طَلَّقَهَا ثَلَاثَ تَطْلِيقَاتٍ عِنْدَ رَسُولِ اللهِ ﷺ فَأَنْفَذَهُ رَسُولُ اللهِ ﷺ وَكَانَ مَا صُنِعَ عِنْدَ رَسُولِ اللهِ ﷺ سُنَّةً» قَالَ سَهْلٌ «حَضَرْتُ هَذَا عِنْدَ رَسُولِ اللهِ ﷺ فَمَضَتِ السُّنَّةُ بَعْدُ فِي الْمُتَلَاعِنَيْنِ أَنْ يُفَرَّقَ بَيْنَهُمَا ثُمَّ لَا يَجْتَمِعَانِ أَبَدًا» قَالَ ابْنُ شِهَابٍ «وَقَالَ الرَّجُلُ عِنْدَ ذَلِكَ بِئْسَ عَبْدُ اللهِ أَنَا إِنْ كَذَبْتُ عِنْدَ رَسُولِ اللهِ ﷺ وتَحَمَّلْتُ فِرْيَةً»