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.

Verse 18. - This line of scarlet thread. Rather, this rope, from קוָה to twist. It is described as made of sewing thread (הוּט), because no doubt it was formed of several such threads twisted into a rope. The scarlet (ָשנִי), or rather crimson, was produced from the dried bodies as well as the eggs of the cochineal insect, called in Arabic, kermes (whence our word crimson, and the German karmesin). This line of scarlet thread is regarded by the Fathers generally, and by our own divines, as Bishop Hall and Bishop Wordsworth, as symbolical of the blood of Christ (see Clement of Rome, 'Epistle to Corinthians,' 12; Justin Martyr, 'Dial. Tryph.' 111; Iren., 'Adv. Haer.,' 4:37; Orig., 'Hom. 2 on Joshua.' "Coccineum, quod sanguinis formam gerebat." See also Bp. Hall, 'Contemplations,' Book 8; and Leviticus 14:4, 6, 42, 51),

Behold, when we come into the land,.... The land of Canaan, and into this city, into that part of it, as the Septuagint, where her house was, meaning not themselves only, but the people of Israel they belonged to:

thou shall bind this line of scarlet thread in the window which thou didst let us down by; the word by refers either to the scarlet thread they were let down by, said to be a cord, Joshua 2:15; and therefore must be a line twisted with various scarlet threads, as Kimchi; who observes, that according to the Targum, it was the border of a red garment; or to the window through which they were let down, as the Septuagint version; it may refer to both, and the sense be, that the same twisted cord of scarlet thread they were let down by should be bound to the same window they were let down through; only this objection there is to the same window, that it was not towards the city, and so not to be seen when they came into it, but looked over the wall without the city: now as Rahab was an instance of the salvation of sinners by the grace of God, for she was a sinner by birth, by practice, and a notorious one; she was an instance of distinguishing grace, of free and efficacious grace, a singular instance of it; and became a true penitent, a real believer, was a justified person, and saved: so the scarlet thread was an emblem of the blood of Christ, by which salvation is; redemption and all the blessings of grace are through it; justification, remission of sin, reconciliation, and atonement, and safety, and protection from avenging justice, and wrath to come, are only by it: likewise the spies, who are also called "messengers", James 2:25; may represent the ministers of the Gospel, who are the messengers of Christ, and the churches, are sent out by him the antitypical Joshua, men of wisdom, courage, and valour, and are sent as spies to bring to light men and things, who direct to the way of salvation and give the same token of it, Mark 16:16,

and thou shall bring thy father, and thy mother, and thy brethren, and all thy father's household home unto thee; into her house, where the scarlet thread was bound, and where only they would be safe, as the Israelites were in the houses where the blood of the paschal lamb was sprinkled, Exodus 12:23; and so they are safe, and they only, who are under the blood of sprinkling, and partake of the virtue of it.

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