[Machine] Jabir said, "When we used to travel with the Messenger of Allah ﷺ, we would climb and say Takbir (Allahu Akbar). And when we would descend, we would say Tasbih (Subhan Allah)." Abu 'Abdur-Rahman Al-Hasan narrated this on the authority of Jabir from a written document, not from hearing it directly.  

قَالَ جَابِرٌ كُنَّا إِذَا كُنَّا مَعَ رَسُولِ اللهِ ﷺ فِي سَفَرٍ فَصَعِدْنَا كَبَّرْنَا وَإِذَا انْحَدَرْنَا سَبَّحْنَا قَالَ أَبُو عَبْدِ الرَّحْمَنِ الْحَسَنُ عَنْ جَابِرٍ صَحِيفَةً وَلَيْسَ بِسَمَاعٍ  

Whenever we went up a place we would say, "Allahu--Akbar (i.e. Allah is Greater)", and whenever we went down a place we would say, "Subhan Allah." (Using translation from Bukhārī 2993)   

«كُنَّا إِذَا صَعِدْنَا كَبَّرْنَا وَإِذَا هَبَطْنَا سَبَّحْنَا»