When a person enters his house and mentions the name of Allah at the time of entering it and while eating the food,

Bismillahirrahmanirrahim 

✦ Jabir bin Abdullah Radi Allahu Anhu reported Allah's Messenger (ﷺ) as saying:

When a person enters his house and mentions the name of Allah at the time of entering it and while eating the food, Satan says (addressing himself: You have no place to spend the night and no evening meal; but when he enters without mentioning the name of Allah, the Satan says: You have found a place to spend the night, and when he does not mention the name of Allah while eating food, he (the Satan) says: You have found a place to spend the night and evening meal.

Sahih Muslim, Book 23, 5006