Sahih Al Bukhari – Book of Food, Meals

Volumn 007, Book 065, Hadith Number 370.
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Narated By .Abu Huraira : The Prophet said, "When your servant brings your food to you, if you do not ask him to join you, then at least ask him to take one or two handfuls, for he has suffered from its heat (while cooking it) and has taken pains to cook it nicely."