'Mayest' in the Bible

O Jerusalem, wash thy heart from wickedness, that thou mayest be saved. How long shall thine evil thoughts lodge within thee?

I have made thee a trier and a fortress among my people; that thou mayest know and try their way.

Therefore thus saith Jehovah, If thou return, then will I bring thee again, that thou mayest stand before me; and if thou take forth the precious from the vile, thou shalt be as my mouth: they shall return unto thee, but thou shalt not return unto them.

There is none to plead thy cause, that thou mayest be bound up: thou hast no healing medicines.