He who appropriated the right of a Muslim by (swearing a false) oath, Allah would make Hell-fire necessary for him and would declare Paradise forbidden for him. A person said to him: Messenger of Allah, even if it is something insignificant? He (the Holy Prophet) replied: (Yes) even if it is the twig of the arak tree. (Using translation from Muslim 137a)
أَنَّ رَسُولَ اللهِ ﷺ قَالَ «مَنِ اقْتَطَعَ حَقَّ امْرِئٍ مُسْلِمٍ بِيَمِينِهِ فَقَدْ أَوْجَبَ اللهُ لَهُ النَّارَ وَحَرَّمَ عَلَيْهِ الْجَنَّةَ» فَقَالَ لَهُ رَجُلٌ وَإِنْ كَانَ شَيْئًا يَسِيرًا يَا رَسُولَ اللهِ؟ قَالَ «وَإِنْ كَانَ قَضِيبًا مِنْ أَرَاكٍ»