'Arm' in the Bible

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

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