Joshua 6:25-26

25But Rahab the harlot, and her father’s household, and all that she had, did Joshua save alive; and she dwelt in the midst of Israel unto this day, because she hid the messengers, whom Joshua sent to spy out Jericho. 26And Joshua charged them with an oath at that time, saying, Cursed be the man before Jehovah, that riseth up and buildeth this city Jericho: with the loss of his first-born shall he lay the foundation thereof, and with the loss of his youngest son shall he set up the gates of it.