Arabic (Original)
أَخْبَرَنَا أَبُو سَعِيدِ بْنُ أَبِي عَمْرٍو ثنا أَبُو الْعَبَّاسِ أنبأ الرَّبِيعُ أنبأ الشَّافِعِيُّ أنبأ مَنْ لَا أَتَّهِمُ عَنْ يَزِيدَ بْنِ الْهَادِ أَنَّ النَّبِيَّ ﷺ كَانَ إِذَا سَالَ السَّيْلُ قَالَ اخْرُجُوا بِنَا إِلَى هَذَا الَّذِي جَعَلَهُ اللهُ طَهُورًا فَنَتَطَهَّرَ مِنْهُ وَنَحْمَدَ اللهَ عَلَيْهِ هَذَا مُنْقَطِعٌ وَرُوِيَ فِيهِ عَنْ عُمَرَ
English Translation
Abu Sa'id ibn Abi Amr narrated to us... from al-Shafi'i, from a trustworthy narrator, from Yazid ibn al-Had, that the Prophet (peace be upon him), when the flood waters flowed, would say: 'Come out with us to this which Allah has made a means of purification, so that we may purify ourselves with it and praise Allah for it.' This is mursal (disconnected), and it has also been narrated from Umar.