Authentic Supplication Number 056.

The Prophet  said: "If the man enters his home, then mentions Allah The Exalted upon his entry and when he eats, the shaytan says: There is no lodging for you and there is no dinner. If he enters and does not mention Allah The Exalted upon his entry, the shaytan says: You've found lodging. And if he does not mention Allah The Exalted when he eats, he says: You've found lodging, and dinner to eat".

Reporters.
Reported by Muslim, and is in The Authentic of Good Sayings as #46.