'Harm' in the Bible

It happened on the seventh day, that the child died. The servants of David feared to tell him that the child was dead; for they said, "Behold, while the child was yet alive, we spoke to him, and he didn't listen to our voice. How will he then harm himself, if we tell him that the child is dead?"

The king said to the Cushite, "Is it well with the young man Absalom?" The Cushite answered, "May the enemies of my lord the king, and all who rise up against you to do you harm, be as that young man is."

David said to Abishai, "Now Sheba the son of Bichri will do us more harm than did Absalom. Take your lord's servants, and pursue after him, lest he get himself fortified cities, and escape out of our sight."