'Arm' in the Bible

Moreover concerning the foreigner, that is not of thy people Israel, when he shall come from a far country for thy great name's sake, and thy mighty hand, and thine outstretched arm; when they shall come and pray toward this house:

with him is an arm of flesh; but with us is Jehovah our God to help us, and to fight our battles. And the people rested themselves upon the words of Hezekiah king of Judah.