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