Supplications to be made at Various Times - Section 1 Mishkat al-Masabih 2424
Arabic hadith text
وَعَنْهُ أَنَّ النَّبِيَّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ كَانَ إِذَا كَانَ فِي سَفَرٍ وَأَسْحَرَ يَقُولُ: «سمع سامع يحمد الله وَحسن بلائه علينا وربنا صَاحِبْنَا وَأَفْضِلْ عَلَيْنَا عَائِذًا بِاللَّهِ مِنَ النَّارِ» . رَوَاهُ مُسلم
Translation
He said that when the Prophet was on a journey he would say at daybreak, "Let a hearer hear beginning with praise of God and His good favour towards us. Our Lord, accompany us and show favour to us who are seeking refuge in God from hell." Muslim transmitted it.