At the time of Sehri while on a journey recite

At the time of Sehri while on a journey recite

سَمْعُ سَامِعٍ بِحَمْدِ اللَّهِ وَنِعْمَتِهِ وَحُسْنِ بَلَائِهِ عَلَيْنَا رَبَّنَا صَاحِبْنَا وَأَفْضِلْ عَلَيْنَا عَائِذَاً بِاللَّهِ مِنَ النَّارِ

"The heaven has heared our praise of Allah and also heard our testification that He favours us and keeps us in good condition. Our Lord stay with us and grant us your favours and I make dua to seek refuge from Allah from Jahannam (hell fire)". (Hisnul Hasin from Muslim etc)

It is also narrated that this dua be recited three times in a raised voice. (Hisnul Hasin from Mustahab)

Note:

Prophet Mohammad (S.A.W.) stated that if a person on journey refrains from worldly affairs in his heart and focuses his attention to Allah and remembers Him, the angels stay with him throughout the journey and if he recites imaginary poetry or does any futile thing then Satan stays with him during his journey. (Hisnul Hasin)