Joshua 2:15-18

So she let them down by a rope through the window, for the house she lived in was part of the city wall. She said to them, “Go to the hills so the pursuers will not find you. Hide yourselves there three days until they return, and then go on your way.” Now the men had said to her, “This oath you made us swear will not be binding on us unless, when we enter the land, you have tied this scarlet cord in the window through which you let us down, and unless you have brought your father and mother, your brothers and all your family into your house.