'Ought' in the Bible

And when all the people came to cause David to eat meat while it was yet day, David sware, saying, So do God to me, and more also, if I taste bread, or ought else, till the sun be down.

And she answered him, Nay, my brother, do not force me; for no such thing ought to be done in Israel: do not thou this folly.

And the king said, Whosoever saith ought unto thee, bring him to me, and he shall not touch thee any more.

And the king said, Is not the hand of Joab with thee in all this? And the woman answered and said, As thy soul liveth, my lord the king, none can turn to the right hand or to the left from ought that my lord the king hath spoken: for thy servant Joab, he bade me, and he put all these words in the mouth of thine handmaid: