Explanation
Ibn ‘Umar (may Allah be pleased with him) informs us in this Hadīth that whenever the Prophet (may Allah's peace and blessings be upon him) prepared to travel and mounted his ride, he would proclaim the greatness of Allah and say this supplication, which involves a number of sublime meanings, one of which is declaring Allah, the Almighty, far exalted above any need or deficiency. It also expresses a person's appreciation for the favors of Allah. Moreover, the Hadīth asserts one's complete lack of might and power, and his admission that he will return to Allah, the Almighty. Then, it comprises invocation to Allah to bestow His favors and grace and to endow the supplicant with piety and guide him to those deeds that please Him and that He accepts. Also in the Hadīth, the supplicant relies on Allah, the Almighty, and leaves all affairs to Him. Allah, the Almighty, is also implored to preserve the supplicant and his relatives and to ease the hardship of traveling and provide refuge from its evil and harm, like returning and seeing anything unpleasant in his family, property, or children. In the other narration, Ibn ‘Umar (may Allah be pleased with him) relates that whenever the Prophet (may Allah's peace and blessings be upon him) returned from a trip, he would say the above-mentioned supplication and make this addition: We are those who return; those who repent; those who worship; and those who praise our Lord – grateful to Him for our safe return. Whenever the Prophet (may Allah's peace and blessings be upon him) stood on a high place, he would proclaim the greatness of Allah – thus standing humble before His majesty and power – and say: “there is no god but Allah, Who has no partner”, acknowledging the uniqueness and Oneness of Allah in His divinity, lordship, and names and attributes, and that He supports His close servants and allies and makes them victorious.