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.
[أبو داود 4:325 والترمذي 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
[صحيح الترمذي 3:152]