Muwatta Malik 1429
موطأ مالك#1429Sahihحَدَّثَنِي يَحْيَى، عَنْ مَالِكٍ، عَنْ عَبْدِ اللَّهِ بْنِ أَبِي بَكْرِ بْنِ مُحَمَّدِ بْنِ عَمْرِو بْنِ حَزْمٍ، أَنَّهُ بَلَغَهُ أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ فِي سَيْلِ مَهْزُورٍ وَمُذَيْنِبٍ " يُمْسَكُ حَتَّى الْكَعْبَيْنِ ثُمَّ يُرْسِلُ الأَعْلَى عَلَى الأَسْفَلِ " .
Yahya related to me from Malik from Abdullah ibn Abi Bakr ibn Muhammad ibn Amr ibn Hazm that he heard that the Messenger of Allah, may Allah bless him and grant him peace, said about the flood-channels of Mahzur and Mudhaynib (in Madina), "Dam them systematically, so that the water is diverted into each property in turn up to ankle level, starting upstream
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: 36:31