Charles Ellicott Commentary Joshua 2:9-11

"and she said unto the men, I know that Jehovah hath given you the land, and that the fear of you is fallen upon us, and that all the inhabitants of the land melt away before you. For we have heard how Jehovah dried up the water of the Red Sea before you, when ye came out of Egypt; and what ye did unto the two kings of the Amorites, that were beyond the Jordan, unto Sihon and to Og, whom ye utterly destroyed. And as soon as we had heard it, our hearts did melt, neither did there remain any more spirit in any man, because of you: for Jehovah your God, he is God in heaven above, and on earth beneath." — Joshua 2:9-11 (ASV)

She said to the men, I know that the Lord has given you the land... The words of this confession are memorable in every way. Note the fulfilment of the prophetic song of Moses, which is partly repeated here (Exodus 15:15–16, with Joshua 2:9-11), All the inhabitants of Canaan shall melt away; fear and dread shall fall upon them. But especially observe the expression of Rahab’s own belief, Jehovah, your God, He is God in heaven above and in earth beneath. Did the faith of the men of Israel go much further than this?

Did it always go so far? (1 Kings 18:21; Jonah 1:9–10). The prophets themselves could not assert much more. The greatest of them were satisfied if they could bring the people of Israel to acknowledge this. Rahab’s confession is also one of a series. The Egyptians, Philistines, Syrians, Assyrians, Babylonians, Persians, were all in turn brought to the same acknowledgment by their contact with Israel. The reason is stated in Joshua 4:24, That all the people of the earth may know the hand of Jehovah, that it is mighty.