'Oh' in the Bible

Then the king of Israel said, “Oh no, the Lord has summoned three kings, only to hand them over to Moab.”

As one of them was cutting down a tree, the iron ax head fell into the water, and he cried out, “Oh, my master, it was borrowed!”

When the servant of the man of God got up early and went out, he discovered an army with horses and chariots surrounding the city. So he asked Elisha, “Oh, my master, what are we to do?”