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قَالَ جَابِرٌ رضي الله عنه: ((كُنَّا إِذَا صَعَدْنَا كَبَّرْنَا، وَإِذَا نَزَلْنَا سَبَّحْنَا)).
Jabir said: Whenever we went up a hill we would say Allaahu 'Akber (Allah is the Most Great) and when we descended we would say Subhaanallaah (Glory is to Allah)
onceText: Hisn al-Muslim by Sa‘id ibn ‘Ali ibn Wahf al-Qahtani, via hisnmuslim.com.