The Messenger of Allah ﷺ said, "Whoever swears an oath, knowing he is lying in it, in order to seize the property of a Muslim by it, will meet Allah while He is angry with him."Ashath bin Qays said, "By Allah, this happened concerning me. There was a piece of land between me and a Jewish man, and he denied my right to it, so I brought him before the Prophet ﷺ."The Messenger of Allah ﷺ asked me, "Do you have evidence?"I said, "No."He then said to the Jewish man, "Swear an oath."I said, "Messenger of Allah, then he will swear and take my property."So Allah the Exalted revealed, "Indeed, those who exchange the covenant of Allah and their oaths for a small price" [Al Imran 3:77], to the end of the verse.In another narration, "Your two witnesses, or his oath."
قال رسول الله ﷺ: من حلف على يمين- وهو فيها فاجر- ليقتطع بها مال امرئ مسلم لقي الله وهو عليه غضبان قال: فقال الأشعث بن قيس في والله كان ذلك، كان بيني وبين رجل من اليهود أرض فجحدني، فقدمته إلى النبي ﷺ، فقال لي رسول الله ﷺ: ألك بينة؟ قال: فقال لليهودي: احلف قال: قلت: يا رسول الله إذن يحلف ويذهب بمالي. قال: فأنزل الله تعالى: {إن الذين يشترون بعهد الله وأيمنهم ثمنا قليلا} إلى آخر الآية. [آل عمران: ٧٧] وفي رواية: شاهداك أو يمينه.
Bukhari related it in the Book of Testimonies (2267, 2266) and Muslim in the Book of Faith (138:220), both of them by way of Abu Muawiya, and, according to Muslim and others, from Amash, from Abu Waail Shaqiq, from Abdullah bin Masud, and he related it.The other narration, also found in both of them, Bukhari in the Book of Testimonies (2670, 2266, 9) and Muslim in the Book of Faith (138:221), both of them by way of Jareer, from Mansur, from Abu Waail, from Abdullah bin Masud, and he related it.