It is narrated from Sayyiduna Ibn Mas'ud (may Allah be pleased with him) that the Prophet (peace and blessings be upon him) said: "When a servant or worker brings food to any one of you, he should let him eat from it first, or make him sit with him, because he has endured its heat and smoke."
Hadith Referenceمسند احمد / مسند المكثرين من الصحابة / 3680
Hadith Gradingحکم دارالسلام:صحيح لغيره، وهذا إسناد ضعيف للين الهجري، وهو إبراهيم بن مسلم ، وعمار بن محمد مختلف فيه.