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 Messenger of Allah (ﷺ) about al-Mahzur, a stream whose water they shared together. The Messenger of Allah (ﷺ) then decided that when water reached the ankles waters should not be held back to flow to the lower.