'Whereof' in the Bible

Jehovah will smite thee with the ulcers of Egypt, and with boils, and with the scab, and with the itch, whereof thou canst not be healed.

Jehovah will smite thee in the knees and in the legs with evil ulcers, whereof thou canst not be healed, from the sole of thy foot unto the top of thy head.

And Jehovah will bring thee into Egypt again with ships, by the way whereof I said unto thee, Thou shalt see it again no more; and there ye shall be sold unto your enemies for bondmen and bondwomen, and there shall be no man to buy you.