'Arm' in the Bible

Moreover concerning the stranger, which is not of thy people Israel, but is come from a far country for thy great name's sake, and thy mighty hand, and thy stretched out arm; if they come and pray in this house;

Then they made the king's son come out, and they put the crown on his head and gave him the arm-bands and made him king: and Jehoiada and his sons put the holy oil on him and said, Long life to the king.

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