'Covered' in the Bible

And David is going up in the ascent of the olives, going up and weeping, and he hath the head covered, and he is going barefooted, and all the people who are with him have covered each his head, and have gone up, going up and weeping;

and the king hath covered his face, yea, the king crieth -- a loud voice -- 'My son Absalom, Absalom, my son, my son.'