'Neighbour' in the Bible

If a man sin against his neighbour, and an oath be laid upon him to make him swear, and the oath come before thine altar in this house;

and the sons of Ammon stand up, and Moab, against the inhabitants of mount Seir, to devote and to destroy, and at their finishing with the inhabitants of Seir, they helped, a man against his neighbour, to destroy.