Joshua 6:25-26

25Yet Joshua spared Rahab the prostitute, her father’s family, and all who belonged to her. She lives in Israel to this very day because she hid the messengers Joshua sent to spy on Jericho.

26At that time Joshua made this solemn declaration: “The man who attempts to rebuild this city of Jericho will stand condemned before the Lord. He will lose his firstborn son when he lays its foundations and his youngest son when he erects its gates!”