Galatians 4:8~11
⁸Formerly, when you did not know God, you were slaves to those who by nature are not gods. ⁹But now that you know God--or rather are known by God--how is it that you are turning back to those weak and miserable principles? Do you wish to be enslaved by them all over again? ¹⁰You are observing special days and months and seasons and years! ¹¹I fear for you, that somehow I have wasted my efforts on you.