Volume 3, Book 40, Number 549:
Narrated ‘Urwa:
When a man from the Ansar quarrelled with AzZubair, the Prophet said, “O Zubair! Irrigate (your
land) first and then let the water flow (to the land of the others).” “On that the Ansari said, (to the
Prophet), “It is because he is your aunt’s son.” On that the Prophet said, “O Zubair! Irrigate till the
water reaches the walls between the pits around the trees and then stop (i.e. let the water go to the
other’s land).” I think the following verse was revealed concerning this event: “But no, by your Lord
They can have No faith Until they make you judge In all disputes between them.” (4.65)