Sunan Ibn Majah 2481
سنن ابن ماجه#2481SahihIt was narrated that Tha'labah bin Abu Malik said:“The Messenger of Allah (ﷺ) ruled concerning the stream of Mahzur that the higher ground took precedence over the lower, so the higher ground should be irrigated until the water reached the ankles, then it should be released to those who were lower
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Al-AlbaniSahih
Muhammad Fouad Abd al-BaqiSahih
Shuaib Al ArnautHasan Lighairihi
Zubair Ali ZaiIsnaad Hasan
In-book reference: 16:46