(١) اللهُ أَكْبَرُ

(٢) سُبْحَانَ اللهُ

Reference: (٢) سُبْحَانَ اللهُ When ascending, recite (1) “Allāh is the greatest,” and when descending, recite (2) “How perfect is Allāh.” Al-Bukhārī (#2993, 6/135).