حَدَّثَنَا أَحْمَدُ بْنُ عَبْدَةَ، أَنْبَأَنَا الْمُغِيرَةُ بْنُ عَبْدِ الرَّحْمَنِ، حَدَّثَنِي أَبِي، عَنْ عَمْرِو بْنِ شُعَيْبٍ، عَنْ أَبِيهِ، عَنْ جَدِّهِ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَضَى فِي سَيْلِ مَهْزُورٍ أَنْ يُمْسِكَ حَتَّى يَبْلُغَ الْكَعْبَيْنِ ثُمَّ يُرْسِلَ الْمَاءَ ‏.‏

It was narrated from 'Amr bin Shu`aib, from his father, from his grandfather, that : the Messenger of Allah (PBUH) ruled concerning the stream of Mahzur that the water should be retained until it reached the ankles, then released. Translation Not Available

Book Ref: Sunan Ibn Majah Book 16 Hadith 2482
Web Ref:  Sunan Ibn Majah Vol 3 Book 16 Hadith 2482

---