Sunan an-Nasa'i, Volume 6, Book 50, Hadith 5503 (DarusSalam) ⓘ
It was narrated that Abu Hurairah said: "When the Messenger of Allah [SAW] traveled and rode his mount, he gestured with his finger - and Shu'bah (one of the narrators) stretched out his finger - and said: 'Allahumma, antas-sahibu fis-safari wal-khalifatu fil-ahli wal-mal. Allahumma, inni a'udhu bika min wa'tha'is-safari, wa kabatil-munqalabi (O Allah, You are our help when we are traveling and the One Who takes care of our families and wealth (in our absence). O Allah, I seek refuge in You from the hardships of travel and the sorrows of return.)'"
أَخْبَرَنَا مُحَمَّدُ بْنُ عُمَرَ بْنِ عَلِيِّ بْنِ مُقَدَّمٍ، قَالَ حَدَّثَنَا ابْنُ أَبِي عَدِيٍّ، عَنْ شُعْبَةَ، عَنْ عَبْدِ اللَّهِ بْنِ بِشْرٍ الْخَثْعَمِيِّ، عَنْ أَبِي زُرْعَةَ، عَنْ أَبِي هُرَيْرَةَ، قَالَ كَانَ رَسُولُ اللَّهِ صلى الله عليه وسلم إِذَا سَافَرَ فَرَكِبَ رَاحِلَتَهُ قَالَ بِإِصْبَعِهِ - وَمَدَّ شُعْبَةُ بِإِصْبَعِهِ - قَالَ " اللَّهُمَّ أَنْتَ الصَّاحِبُ فِي السَّفَرِ وَالْخَلِيفَةُ فِي الأَهْلِ وَالْمَالِ اللَّهُمَّ إِنِّي أَعُوذُ بِكَ مِنْ وَعْثَاءِ السَّفَرِ وَكَآبَةِ الْمُنْقَلَبِ " .
also referenced under: Hadith 5501 (Reference) & Book 50, Hadith 74 (In-Book)