If he, sallallaahu ‘alayhi wa sallam, was unable to find some form of reconciliation between them, he would rule according to Islamic laws

` the Ansaar disputed with Az-Zubayr regarding some waterways of the Harrah area of Madinah (an area with black rocks) that they used to water their date-palm trees. They both used the water for their trees.They went to the Prophet of Allah, sallallaahu ‘alayhi wa sallam, and complained to him, and he, sallallaahu ‘alayhi wa sallam, said to Az-Zubayr: “O Zubayr, water your land, then let the water go forth to your neighbor.” The Ansaari man replied to the Messenger of Allah, sallallaahu ‘alayhi wa sallam, and said: “O Messenger of Allah, have you given this ruling because he is the son of your aunt (from the tribe of his mother)?” At that, his face, sallallaahu ‘alayhi wa sallam, became colored (out of anger). Then he, sallallaahu ‘alayhi wa sallam, said: “Water your land O Zubayr, then hold the water back until you feed and water your plants completely.” Az-Zubayr said: “I think that the following verse was revealed with regards to this story (which means): «But no, by your Lord, they will not [truly] believe until they make you, [O Muhammad], judge concerning that over which they dispute among themselves and then find within themselves no discomfort from what you have judged and submit in [full, willing]submission.»