Narrated Jabir bin `Abdullah: 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."
Hadith ReferenceSahih Bukhari / The Book of Jihad (Fighting For Allah’S Cause) / Hadith: 2993
Hadith Gradingمحدثین:أحاديث صحيح البخاريّ كلّها صحيحة