Galatians 4:8-12

However at that time, when you did not know God, you were slaves to those which by nature are not gods.

But now that you have come to know God, or rather to be known by God, how is it that you turn back again to the weak and worthless elementary principles, to which you want to be enslaved all over again?

You meticulously observe days and months and seasons and years.

I fear for you, that perhaps I have labored over you in vain.

I beg of you, brothers and sisters, become as I am, for I also have become as you are. You have done me no wrong;