Sunan Ibn Majah, Hadith 2297 ⓘ
It was narrated that 'Umair, the freed slave of Aabi Lahm, said: "My master used to give me food and I would feed others from it, then he stopped me," or he said: "He beat me. So I asked the Prophet,” -or- "he asked him and I said: 'I will not stop.' He said: 'Both of you will be rewarded."'
حَدَّثَنَا أَبُو بَكْرِ بْنُ أَبِي شَيْبَةَ، حَدَّثَنَا حَفْصُ بْنُ غِيَاثٍ، عَنْ مُحَمَّدِ بْنِ زَيْدٍ، عَنْ عُمَيْرٍ، - مَوْلَى آبِي اللَّحْمِ - قَالَ كَانَ مَوْلاَىَ يُعْطِينِي الشَّىْءَ فَأُطْعِمُ مِنْهُ فَمَنَعَنِي - أَوْ قَالَ فَضَرَبَنِي - فَسَأَلْتُ النَّبِيَّ ـ صلى الله عليه وسلم ـ أَوْ سَأَلَهُ فَقُلْتُ لاَ أَنْتَهِي أَوْ لاَ أَدَعُهُ . فَقَالَ " الأَجْرُ بَيْنَكُمَا " .
also referenced under: Book 12, Hadith 2385 (In-Book) & Volume 3, Book 12, Hadith 2297 (DarusSalam)