Bulugh al-Maram, Book 13, Hadith 1380 (English) ⓘ

Narrated 'Abdullah bin 'Amr (RA): A desert Arab came to the Prophet and said, "O Allah's Messenger, what are the major sins?" The narrator reported the Hadith and it contains: "The false oath." It contains also: I asked, "What is the false oath?" The Prophet replied, "It is that (oath) by which one takes possession of the property of a Muslim person, while he is lying." [al-Bukhari reported it].

وَعَنْ عَبْدِ اَللَّهِ بْنِ عَمْرِوٍ رَضِيَ اَللَّهُ عَنْهُمَا قَالَ: { جَاءَ أَعْرَابِيٌّ إِلَى اَلنَّبِيِّ ‏- صلى الله عليه وسلم ‏-فَقَالَ: يَا رَسُولَ اَللَّهِ! مَا اَلْكَبَائِرُ?.‏ … فَذَكَرَ اَلْحَدِيثَ, وَفِيهِ قُلْتُ: وَمَا اَلْيَمِينُ اَلْغَمُوسُ? قَالَ: " اَلَّذِي يَقْتَطِعُ مَالَ امْرِئٍ مُسْلِمٍ, هُوَ فِيهَا كَاذِبٌ" } أَخْرَجَهُ اَلْبُخَارِيُّ.‏ 1‏.‏ ‏1 ‏- صحيح.‏ رواه البخاري ( 6920 )‏.‏