'Self same' in the Bible

Now he that hath wrought us for the selfsame thing is God, who also hath given unto us the earnest of the Spirit.

For behold this selfsame thing, that ye sorrowed after a godly sort, what carefulness it wrought in you, yea, what clearing of yourselves, yea, what indignation, yea, what fear, yea, what vehement desire, yea, what zeal, yea, what revenge! In all things ye have approved yourselves to be clear in this matter.