21. she bound the scarlet line in the window--probably soon after the departure of the spies. It was not formed, as some suppose, into network, as a lattice, but simply to hang down the wall. Its red color made it conspicuous, and it was thus a sign and pledge of safety to Rahab's house, as the bloody mark on the lintels of the houses of the Israelites in Egypt to that people.
JFB.
Picture Study Bible