Sunan Ibn Majah 2482
سنن ابن ماجه#2482Sahihحَدَّثَنَا 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 (ﷺ) ruled concerning the stream of Mahzur that the water should be retained until it reached the ankles, then released
Scholarly Authentication
The label above is the grade most of these scholars gave — one dissenting opinion no longer speaks for all of them. If any scholar calls a narration fabricated, that verdict is shown instead, whatever the others say. Each scholar's own wording:
In-book reference: 16:47