Supplication when leaving the home

بِسْمِ اللَّهِ, تَوَكَّلْتُ عَلَى اللَّهِ, وَلَاَ حَوْلَ وَلَا قُوَّةَ إِلاَّ بِاللَّهِ

(In the name of Allah, I place my trust in Allah, and there is no might nor power except with Allah.)

Source: Abu Dawud 4/325, At-Tirmizi 5/490, Al-Albani, Sahih At-Tirmizi 3/151

اللَّهُمَّ إِنِّي أَعُوذُ بِكَ أَنْ أَضِلَّ, أَوْ أُضَلَّ, أَوْ أَزِلَّ, أَوْ أُزَلَّ, أَوْ أَظْلِمَ, أَوْ أُظْلَمَ, أَوْ أَجْهَلَ, أَوْ يُجْهَلَ عَلَيَّ

(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)

Source: Abu Dawud, Ibn Majah, An-Nasa'i, At-Tirmizi, Al-Albani, Sahih At-Tirmizi 3/152, Sahih Ibn Majah 2/336