'Covered' in the Bible

And David went up the ascent of the Mount of Olives, and wept as he went, and his head was covered and he walked barefoot. Then all the people who were with him each covered his head and went up weeping as they went.

The king covered his face and cried out with a loud voice, “O my son Absalom, O Absalom, my son, my son!”

Then Joab came into the house to the king and said, “Today you have covered with shame the faces of all your servants, who today have saved your life and the lives of your sons and daughters, the lives of your wives, and the lives of your concubines,