Joshua 6:22-25

The harlot's house Which, together with the wall upon which it leaned, was left standing, by a special favour of God to her. Left them without the camp of Israel Till they were cleansed from the impurities of their Gentile state, and instructed in the Jewish religion, and solemnly admitted into that church, for which Rahab's good counsel and example had doubtless prepared them. Joshua saved Rahab alive For that general command to root out the Canaanites seems to have had some exceptions, in case any of them had sincerely and seasonably cast off their idolatry and wickedness, submitted to the Israelites, and become members of the church of God. She dwelleth in Israel unto this day This shows that the book of Joshua was written while Rahab was alive.