'Oh' in the Bible

Absalom said moreover, Oh that I were made judge in the land, that every man which hath any suit or cause might come unto me, and I would do him justice!

And the king trembleth, and goeth up on the upper chamber of the gate, and weepeth, and thus he hath said in his going, 'My son! Absalom my son; my son Absalom; oh that I had died for thee, Absalom, my son, my son.'

Mephibosheth said to the king, “Let him even take it all, since my lord the king has returned to his own house in safety and peace.”

And David longed, and said, Oh that one would give me drink of the water of the well of Bethlehem, which is by the gate!