It was narrated that `Uthman bin `Affan (رضي الله عنه) said: The Messenger of Allah (ﷺ) said: `There is no Muslim who leaves his house, intending to travel or otherwise, and says when leaving: `In the Name of Allah, I believe in Allah, I seek the protection of Allah, I put my trust in Allah, there is no strength and no power except with Allah, but he will be granted the goodness of that going out, and the evil of that going out will be diverted from him.”
Source: sunnah.com
Other translations
Arabic
حَدَّثَنَا هَاشِمٌ، حَدَّثَنَا أَبُو جَعْفَرٍ الرَّازِيُّ، عَنْ عَبْدِ الْعَزِيزِ بْنِ عُمَرَ، رَضِيَ اللَّهُ عَنْهُ عَنْ صَالِحِ بْنِ كَيْسَانَ، عَنْ رَجُلٍ، عَنْ عُثْمَانَ بْنِ عَفَّانَ، رَضِيَ اللَّهُ عَنْهُ قَالَ قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ مَا مِنْ مُسْلِمٍ يَخْرُجُ مِنْ بَيْتِهِ يُرِيدُ سَفَرًا أَوْ غَيْرَهُ فَقَالَ حِينَ يَخْرُجُ بِسْمِ اللَّهِ آمَنْتُ بِاللَّهِ اعْتَصَمْتُ بِاللَّهِ تَوَكَّلْتُ عَلَى اللَّهِ لَا حَوْلَ وَلَا قُوَّةَ إِلَّا بِاللَّهِ إِلَّا رُزِقَ خَيْرَ ذَلِكَ الْمَخْرَجِ وَصُرِفَ عَنْهُ شَرُّ ذَلِكَ الْمَخْرَجِ.
sunnah.com