‘A’isha reported the Prophet as saying, “He who develops land which has no owner has the best right to it.” ‘Urwa said that ‘Umar gave decision accordingly during his caliphate.
‘Urwa said az-Zubair had a dispute with one of the Ansar about streamlets in the lava plain, and the Prophet said, “Water your ground, Zubair, then let the water run to your neighbour.” The Ansari said, “It is because he is your cousin.” Thereupon his face changed colour and he said, “Water your ground, Zubair, then keep back the water till it returns to the embankment, and afterwards let it run to your neighbour.” So the Prophet paid regard to az-Zubair’s right by the clear decision when the Ansari made him angry and he had given them advice which would have made matters easy for both of them.
‘Ubada b. as-Samit told that he said, “Messenger of God, one of those whom I have been teaching the Book and the Qur’an has presented me with a bow, and as it cannot be reckoned property may I shoot with it in God's path?" He replied, “If you want to have a necklace of fire put on you, accept it."
