'Whereof' in the Bible

Now Elisha was fallen sick of his sickness whereof he died. And Joash the king of Israel came down unto him, and wept over his face, and said, O my father, my father, the chariot of Israel, and the horsemen thereof.

For they served idols, whereof the LORD had said unto them, Ye shall not do this thing.

And he built altars in the house of Jehovah, whereof Jehovah said, In Jerusalem will I put my name.