Sayyiduna Abu Hurayrah (may Allah be pleased with him) narrates from the Messenger of Allah (peace and blessings be upon him): "When someone's slave prepares food for him and brings it, let him seat that slave with himself, for he has endured its heat and smoke. If the food is little, let him at least give him a morsel or two."
Imam Muslim (may Allah have mercy on him) recorded it in his Sahih from Abdullah bin Maslamah al-Qa'nabi.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب النفقات / 15781