Joshua 2:17-20

The spies said: You made us promise to let you and your family live. We will keep our promise, but you can't tell anyone why we were here. You must tie this red rope on your window when we attack, and your father and mother, your brothers, and everyone else in your family must be here with you. We'll take the blame if anyone who stays in this house gets hurt. But anyone who leaves your house will be killed, and it won't be our fault.