Adam Clarke on Habakkuk 3:10

The mountains saw thee - This is the continued answer to the questions in Hab 3:8. These are figures highly poetic, to show with what ease God accomplished the most arduous tasks in behalf of his people. As soon as the mountains saw him, they trembled, they were in pangs. When he appeared, the sea fled to right and left, to give him a passage. "It uttered its voice." The separation of the waters occasioned a terrible noise. "And it lifted up its hands on high." Its waters, being separated, stood in heaps on the right hand and left. These heaps or waves are poetically represented here as the hands of the sea.