Hadith on Injustice: Worst sins are exploitation of women, workers, and animals

Ibn Umar reported: The Messenger of Allah, peace and blessings be upon him, said, “Among the greatest of sins to Allah is that a man marries a woman and when he fulfills his needs with her, he divorces her and leaves with her dowry. And that a man employ another man and leave without paying him, and finally one who kills an animal for no legitimate purpose.

Source: al-Sunan al-Kubrá 14395

Grade: Hasan (fair) according to Al-Albani

عَنِ ابْنِ عُمَرَ رَضِيَ اللهُ عَنْهُمَا أَنَّ رَسُولَ اللهِ صَلَّى اللهُ عَلَيْهِ وَسَلَّمَ قَالَ مِنْ أَعْظَمِ الذُّنُوبِ عِنْدَ اللهِ رَجُلٌ تَزَوَّجَ امْرَأَةً فَلَمَّا قَضَى حَاجَتَهُ مِنْهَا طَلَّقَهَا وَذَهَبَ بِمَهْرِهَا وَرَجُلٌ اسْتَعْمَلَ رَجُلًا فَذَهَبَ بِأُجْرَتِهِ وَآخَرُ يَقْتُلُ دَابَّةً عَبَثًا

14395 السنن الكبرى للبيهقي

1567 المحدث الألباني خلاصة حكم المحدث حسن في صحيح الجامع