Abu Dawud Book 18, Hadith Number 3631.

Narated By Tha’labah ibn AbuMalik : Tha’labah heard his elders say that a man from the Quraysh had his share with Banu Qurayzah (in water). He brought the dispute to the Apostle of Allah (PBUH) about al-Mahzur, a stream whose water they shared together. The Apostle of Allah (PBUH) then decided that when water reached the ankles waters should not be held back to flow to the lower.