عَنِ ابْنِ عَبَّاسٍ رَضِيَ اللَّهُ عَنْهُمَا عَنِ النَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ قَالَ: «لَوْ يُعْطَى النَّاسُ بِدَعْوَاهُمْ لَادَّعَى نَاسٌ دِمَاءَ رِجَالٍ وَأَمْوَالَهُمْ وَلَكِنَّ الْيَمِينَ عَلَى الْمُدَّعَى عَلَيْهِ» . رَوَاهُ مُسْلِمٌ وَفِي «شَرْحِهِ لِلنَّوَوِيِّ» أَنَّهُ قَالَ: وَجَاءَ فِي رِوَايَةِ «الْبَيْهَقِيِّ» بِإِسْنَادٍ حَسَنٍ أَوْ صَحِيحٍ زِيَادَةٌ عَنِ ابْنِ عَبَّاسٍ مَرْفُوعًا: «لَكِنَّ الْبَيِّنَةَ على المدَّعي واليمينَ على مَنْ أنكر»

Ibn Mas'ud reported God’s Messenger as saying, “If anyone swears a firm oath, 1 acting wickedly thereby, and appropriates by it property belonging to a Muslim, God will be angry when he meets Him on the day of resurrection.” And God has sent down the verification of that, “Those who barter for a small price God's covenant and their oaths”2. (Bukhari and Muslim.)1. Or an oath he is compelled to take.2. Al-Qur’an, 3:77