2:8-21 Rahab had heard of the miracles the Lord wrought for Israel. She believed that his promises would certainly be fulfilled, and his threatenings take effect; and that there was no way of escape but by submitting to him, and joining with his people. The conduct of Rahab proved that she had the real principle of Divine faith. Observe the promises the spies made to her. The goodness of God is often expressed by his kindness and truth, Ps 117:2; in both these we must be followers of him. Those who will be conscientious in keeping promises, are cautious in making them. The spies make needful conditions. The scarlet cord, like the blood upon the doorpost at the passover, recalls to remembrance the sinner's security under the atoning blood of Christ; and that we are to flee thereto for refuge from the wrath of a justly offended God. The same cord Rahab used for the saving of these Israelites, was to be used for her own safety. What we serve and honour God with, we may expect he will bless, and make useful to us.
16-21. she said—rather "she had said," for what follows must have been part of the previous conversation.
Get you to the mountain—A range of white limestone hills extends on the north, called Quarantania (now Jebel Karantu), rising to a height of from twelve hundred to fifteen hundred feet, and the sides of which are perforated with caves. Some one peak adjoining was familiarly known to the inhabitants as "the mountain." The prudence and propriety of the advice to flee in that direction rather than to the ford, were made apparent by the sequel.