Galatians 4:16-23

16Am I therefore become your enemy, because I tell you the truth? 17They zealously affect you, but not well; yea, they would exclude you, that ye might affect them. 18But it is good to be zealously affected always in a good thing, and not only when I am present with you. 19My little children, of whom I travail in birth again until Christ be formed in you, 20I desire to be present with you now, and to change my voice; for I stand in doubt of you.

21Tell me, ye that desire to be under the law, do ye not hear the law? 22For it is written, that Abraham had two sons, the one by a bondmaid, the other by a freewoman. 23But he who was of the bondwoman was born after the flesh; but he of the freewoman was by promise.