بِسْـمِ اللّهِ وَلَجْنـَا، وَبِسْـمِ اللّهِ خَـرَجْنـَا، وَعَلَـى رَبِّنـَا تَوَكّلْـنَا.

Bismil-lahi walajna, wabismil-lahi kharajna, waAAala 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.

Abu Dawud 4:325