'Mayest' in the Bible

And now, come, let me, I pray thee, give thee counsel, that thou mayest save thine own life, and the life of thy son Solomon.

and keep the charge of Jehovah thy God, to walk in his ways, to keep his statutes, and his commandments, and his ordinances, and his testimonies, as it is written in the law of Moses, that thou mayest prosper in all that thou doest and whithersoever thou turnest thyself;

And I will take thee, that thou mayest reign over all that thy soul desireth, and thou shalt be king over Israel.