'Extremity' in the Bible

and thou hast heard what they speak, and afterwards are thy hands strengthened, and thou hast gone down against the camp.' And he goeth down, he and Phurah his young man, unto the extremity of the fifties who are in the camp;

And he saith unto them, 'Look at me, and thus do; and lo, I am coming into the extremity of the camp -- and it hath been -- as I do so ye do;

And Gideon cometh -- and the hundred men who are with him -- into the extremity of the camp, at the beginning of the middle watch (it hath only just confirmed the watchmen), and they blow with trumpets -- dashing in pieces also the pitchers which are in their hand;