Sayyiduna Abdullah bin Sarjis (may Allah be pleased with him) says that when the Prophet (peace and blessings be upon him) travelled, he would say: 'Allahumma anta al-sahibu fi al-safar, wa al-khalifatu fi al-ahl. Allahumma-shabna fi safarina, wa-khlufna fi ahlina. Allahumma inni a'udhu bika min wa'tha'i al-safar, wa ka'abati al-munqalab, wa al-hawri ba'da al-kawr, wa da'wati al-mazlum, wa su'i al-manzari fi al-ahli wa al-mal' (O Allah, You are the Companion on the journey and the Guardian over the family. O Allah, be our Companion on our journey and our Guardian over our family. O Allah, I seek refuge in You from the hardship of travel, the grief of an unhappy return, decrease after increase, the supplication of the wronged, and an evil sight in family and wealth.)
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الحج / 10303