Joshua 2:18

“Behold, [when] we come into the land, etc.] 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, (<060215>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,…”

“The “line” or cord was spun of threads dyed with cochineal: i. e., of a deep and bright scarlet color. The color would catch the eye at once, and supplied an obvious token by which the house of Rahab might be distinguished. The use of scarlet in the Levitical rites, especially in those more closely connected with the idea of putting away of sin and its consequences (compare e. g., Leviticus 14:4, Leviticus 14:6,Leviticus 14:51; Numbers 19:6), naturally led the fathers, from Clement of Rome onward, to see in this scarlet thread, no less than in the blood of the Passover (Exodus 12:7, Exodus 12:13, etc.), an emblem of salvation by the Blood of Christ; a salvation common alike to Christ’s…”

“Into the land - That is, over Jordan, and near the city. This line of scarlet - Probably the same with which she was about to let them down. Window - That it may be easily discerned by our soldiers. Joshua 2:19”

“scarlet thread: Jos 2:21; Lev 14:4; Num 4:8, Num 19:6; Heb 9:19 bring: Heb. gather thy father: Jos 2:13, Jos 6:23; Gen 7:1, Gen 12:2, Gen 19:12-17; Est 8:6; Luk 19:9; Act 10:27, Act 10:33; Act 11:14; Ti2 1:16 Joshua 2:19”