بِسْمِ اللَّهِ وَلَجْنَا، وَبِسْمِ اللَّهِ خَرَجْنَا، وَعَلَى اللَّهِ رَبِّنَا تَوَكَّلْنَا

Bismil-laahi walajna, wabismil-laahi kharajna, wa'alallaahi rabbina tawakkalna

In the name of Allah we enter and in the name of Allah we leave, and upon our Lord we place our trust. Then give salaam to the people of the house. [1] 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;[2]

Reference: [1] Hasan (Ibn Baz). Abu Dawud: 5096 [2] Muslim: 2018