Sahih al-Bukhari, Hadith 2557 ⓘ
Narrated Abu Huraira: The Prophet said, "When your servant brings your meals to you then if he does not let him sit and share the meals, then he should at least give him a mouthful or two mouthfuls of that meal or a meal or two meals, as he has prepared it."
حَدَّثَنَا حَجَّاجُ بْنُ مِنْهَالٍ، حَدَّثَنَا شُعْبَةُ، قَالَ أَخْبَرَنِي مُحَمَّدُ بْنُ زِيَادٍ، سَمِعْتُ أَبَا هُرَيْرَةَ ـ رضى الله عنه ـ عَنِ النَّبِيِّ صلى الله عليه وسلم " إِذَا أَتَى أَحَدَكُمْ خَادِمُهُ بِطَعَامِهِ، فَإِنْ لَمْ يُجْلِسْهُ مَعَهُ، فَلْيُنَاوِلْهُ لُقْمَةً أَوْ لُقْمَتَيْنِ أَوْ أُكْلَةً أَوْ أُكْلَتَيْنِ، فَإِنَّهُ وَلِيَ عِلاَجَهُ " .
also referenced under: Book 49, Hadith 40 (In-Book) & Volume 3, Book 46, Hadith 732 (USC-MSA)