EXALTATION WHEN CLIMBING H 988 "When the Prophet, praise and peace be upon him, and his forces climbed a height they proclaimed, 'Allah is Great' and when they descended they proclaimed, 'Exalted is Allah.'" R 988 Abu Daud with a chain up to ibn Omar who related this.
976- وعن ابن عمرَ رضي اللهُ عنهما ، قَالَ : كَانَ النَّبيُّ صلى الله عليه وآله وسلم وجيُوشُهُ إِذَا عَلَوا الثَّنَايَا كَبَّرُوا ، وَإِذَا هَبَطُوا سَبَّحُوا . رواه أَبُو داود بإسناد صحيح .