Khaithama reported: While we were sitting in the company of 'Abdullah b. 'Umar there came in his steward. He (Ibn 'Umar) said: Have you supplied the provision to the slaves? He said: No. Upon this he said: Go and give (the provision) to them, for the Messenger of Allah (ﷺ) has said: This sin is enough for a man that he withholds the subsistence from one whose master he is.
Source: sunnah.com
Other translations
Arabic
حَدَّثَنَا سَعِيدُ بْنُ مُحَمَّدٍ الْجَرْمِيُّ، حَدَّثَنَا عَبْدُ الرَّحْمَنِ بْنُ عَبْدِ الْمَلِكِ بْنِ أَبْجَرَ الْكِنَانِيُّ، عَنْ أَبِيهِ، عَنْ طَلْحَةَ بْنِ مُصَرِّفٍ، عَنْ خَيْثَمَةَ، قَالَ كُنَّا جُلُوسًا مَعَ عَبْدِ اللَّهِ بْنِ عَمْرٍو إِذْ جَاءَهُ قَهْرَمَانٌ لَهُ فَدَخَلَ فَقَالَ أَعْطَيْتَ الرَّقِيقَ قُوتَهُمْ قَالَ لاَ . قَالَ فَانْطَلِقْ فَأَعْطِهِمْ . قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم " كَفَى بِالْمَرْءِ إِثْمًا أَنْ يَحْبِسَ عَمَّنْ يَمْلِكُ قُوتَهُ " .
sunnah.com