'Thine' in the Bible

and the righteousness of faith doth thus speak: 'Thou mayest not say in thine heart, Who shall go up to the heaven,' that is, Christ to bring down?

I will recompense again, saith the Lord;' if, then, thine enemy doth hunger, feed him; if he doth thirst, give him drink; for this doing, coals of fire thou shalt heap upon his head;