Muwatta Imam Malik Book of Judgements, Hadith 11

Malik related to me from al-Ala ibn Abd ar-Rahman from Mabad ibn Kab as-Salami from his brother Abdullah ibn Kab ibn Malik al-Ansari from Abu Umama that the Messenger of Allah ﷺ said, "Whoever cuts off the right of a muslim man by his oath, Allah forbids him the Garden and obliges the Fire for him." They said, "Even if it is something insignificant, Messenger of Allah?" He said, "Even if it is a tooth-stick, even if it is a tooth- stick," repeating it three times.

وَحَدَّثَنِي مَالِكٌ، عَنِ الْعَلاَءِ بْنِ عَبْدِ الرَّحْمَنِ، عَنْ مَعْبَدِ بْنِ كَعْبٍ السَّلَمِيِّ، عَنْ أَخِيهِ عَبْدِ اللَّهِ بْنِ كَعْبِ بْنِ مَالِكٍ الأَنْصَارِيِّ، عَنْ أَبِي أُمَامَةَ، أَنَّ رَسُولَ اللَّهِ ﷺ قَالَ " مَنِ اقْتَطَعَ حَقَّ امْرِئٍ مُسْلِمٍ بِيَمِينِهِ حَرَّمَ اللَّهُ عَلَيْهِ الْجَنَّةَ وَأَوْجَبَ لَهُ النَّارَ " . قَالُوا وَإِنْ كَانَ شَيْئًا يَسِيرًا يَا رَسُولَ اللَّهِ قَالَ " وَإِنْ كَانَ قَضِيبًا مِنْ أَرَاكٍ وَإِنْ كَانَ قَضِيبًا مِنْ أَرَاكٍ وَإِنْ كَانَ قَضِيبًا مِنْ أَرَاكٍ " . قَالَهَا ثَلاَثَ مَرَّاتٍ .