'Head Covered' in the Bible

And David went up by the ascent of mount Olivet, and wept as he went up, and had his head covered, and he went barefoot: and all the people that was with him covered every man his head, and they went up, weeping as they went up.

And Mordecai came again to the king's gate. But Haman hasted to his house mourning, and having his head covered.

Every man praying or prophesying, having his head covered, dishonoureth his head.

So, if a woman does not cover her [physical] head [i.e., with sufficient hair or a cloth shawl], she might as well cut her hair off. But if it is a shame for a woman to cut her hair off or shave her head [See note on verse 5], then she should have her head covered [i.e., with hair or a shawl].

For man indeed ought not to have his head covered, being God's image and glory; but woman is man's glory.