Joshua 2:17-21

The men said to her, “You must do as we say. If not, we cannot be responsible for keeping this oath you have made us swear. When we return to this land, you must tie this red rope in the window through which you let us down. Bring your father, mother, brothers, and all your family into your house. If anyone leaves your house and is killed, it is his own fault. We cannot be responsible for him. If anyone in your house is hurt, we will be responsible. But if you tell anyone about this, we will be free from the oath you made us swear.” Rahab answered, “I agree to this.” So she sent them away, and they left. Then she tied the red rope in the window.