Galatians 4:10

7 So that you are no longer a servant, but a son; and if a son, then the heritage of God is yours.

8 But at that time, having no knowledge of God, you were servants to those who by right are no gods:

9 But now that you have come to have knowledge of God, or more truly, God has knowledge of you, how is it that you go back again to the poor and feeble first things, desiring to be servants to them again?

10 You keep days, and months, and fixed times, and years.

11 I am in fear of you, that I may have been working for you to no purpose.

12 My desire for you, brothers, is that you may be as I am, because I am as you are. You have done me no wrong;

13 But you have knowledge that with a feeble body I was preaching the good news to you the first time;