When Leaving Home – 1
بِسْمِ اللَّهِ تَوَكَّلْـتُ عَلَى اللَّهِ، وَلاَ حَوْلَ وَلاَ قُـوَّةَ إِلاَّ بِاللَّهِ.
Bismil-lah, tawakkaltu AAalal-lah, wala hawla wala quwwata illa billah.
In the name of Allah, I place my trust in Allah, and there is no might nor power except with Allah.
Abu Dawud 4:325, At-Tirmidhi 5:490
When Leaving Home – 2
اَللَّهُـمَّ إِنِّي أَعُـوذُ بِكَ أَنْ أَضِـلَّ أَوْ أُضَـلَّ، أَوْ أَزِلَّ أَوْ أُزَلَّ، أَوْ أَظْلِـمَ أَوْ أَُظْلَـمَ، أَوْ أَجْهَلَ أَوْ يُـجْهَلَ عَلَـيَّ .
Allahumma innee aAAoothu bika an adilla aw odal, aw azilla aw ozall, aw athlima aw othlam, aw ajhala aw yujhala AAalay.
O Allah, I take refuge with You lest I should stray or be led astray, or slip or be tripped, or oppress or be oppressed, or behave foolishly or be treated foolishly.’ slip: i.e. to commit a sin unintentionally
At-Tirmidhi 3:152