What did Prophet Muhammad (peace be upon him) say regarding taking a false oath to unjustly obtain someone else's property?
 Narrated `Abdullah:                     Allah's Apostle said, "If somebody takes a false oath in order to get the property of a Muslim (unjustly) by that oath, then Allah will be angry with him when he will meet Him." Al-Ash'ath informed me, "By Allah! This was said regarding me. There was a dispute about a piece of land between me and a man from the Jews who denied my right. I took him to the Prophet. Allah's Apostle asked me, 'Do you have an evidence?' I replied in the negative. He said to the Jew, 'Take an oath.' I said, 'O Allah's Apostle! He will surely take an oath and take my property unjustly." So, Allah revealed: "Verily! Those who purchase a little gain at the cost of Allah's covenant and their oaths . . . " (3.77)