'Father's' in the Bible

Now therefore, since I've treated you so kindly, please swear in the name of the LORD that you'll also be kind to my father's household by giving me this sure sign:

when we invade the land, if you don't tie this rope made with red cords in the window through which you let us down, and if you don't gather your father, your mother, your brothers, and all of the rest of your father's household into your house.