Bulugh al-Maram 1380
Narrated 'Abdullah bin 'Amr (RA):
A desert Arab came to the Prophet (ﷺ) 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 (ﷺ) 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 )‏.‏