'Infirmity' in the Bible

I speak after the manner of men because of the infirmity of your flesh: for as ye presented your members as'servants to uncleanness and to iniquity unto iniquity, even so now present your members as'servants to righteousness unto sanctification.

And in like manner the Spirit also helpeth our infirmity: for we know not how to pray as we ought; but the Spirit himself maketh intercession for us with groanings which cannot be uttered;