'Alone' in the Bible

And David said to Abishai, and to all his servants, Behold, my son, who came forth of my bowels, seeks my life: how much more now a Benjaminite? let him alone and let him curse; for Jehovah has bidden him.

And David sat between the two gates; and the watchman went up to the roof of the gate, on to the wall, and lifted up his eyes and looked, and behold, a man running alone.

And the watchman cried, and told the king. And the king said, If he be alone, there is news in his mouth. And he came on and drew near.

And the watchman saw another man running; and the watchman called to the porter and said, Behold a man running alone. And the king said, He also is a bearer of news.