Abu Huraira reported: The Prophet, peace and blessings be upon him, said, "Allah said: There are three persons whom I will oppose on the Day of Resurrection: a man who gives his word by Me but proves treacherous, a man who sells a free person and consumes the price, and a man who employs a worker and receives a completed job but he does not pay him his wages."
Source: Sahih Bukhari 2114
Grade: Sahih (authentic) according to Al-Bukhari
عَنْ أَبِي هُرَيْرَةَ رَضِيَ اللَّهُ عَنْهُ عَنْ النَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ قَالَ قَالَ اللَّهُ ثَلَاثَةٌ أَنَا خَصْمُهُمْ يَوْمَ الْقِيَامَةِ رَجُلٌ أَعْطَى بِي ثُمَّ غَدَرَ وَرَجُلٌ بَاعَ حُرًّا فَأَكَلَ ثَمَنَهُ وَرَجُلٌ اسْتَأْجَرَ أَجِيرًا فَاسْتَوْفَى مِنْهُ وَلَمْ يُعْطِ أَجْرَهُ
2114 صحيح البخاري كِتَاب الْبُيُوعِ بَاب إِثْمِ مَنْ بَاعَ حُرًّا