Verses with the word climb in the Old Testament (4 verses):

Jeremiah 4:29
The whole city shall flee for the noise of the horsemen and bowmen; they shall go into thickets, and climb up upon the rocks: every city shall be forsaken, and not a man dwell therein.

Joel 2:7
They shall run like mighty men; they shall climb the wall like men of war; and they shall march every one on his ways, and they shall not break their ranks:

Joel 2:9
They shall run to and fro in the city; they shall run upon the wall, they shall climb up upon the houses; they shall enter in at the windows like a thief.

Amos 9:2
Though they dig into hell, thence shall mine hand take them; though they climb up to heaven, thence will I bring them down: