قَالَ جَابِرٌ - رضي الله عنه -: «كُنَّا إِذَا صَعَدْنَا كَبَّرْنَا، وَإِذَا نَزَلْنَا سَبَّحْنَا».
Jabir (ra), said:Whenever we went up a hill we would say Allāhu Akbar (Allah is the Most Great) and when we descended we would say Subḥānallāh (Glory is to Allah).
SourceAl-Bukhari, cf. Al-Asqalani, Fathul-Bari 6/135.