Galatians 4:8-10

Young's Literal Translation

⁸ But then, indeed, not having known God, ye were in servitude to those not by nature gods,

⁹ and now, having known God -- and rather being known by God -- how turn ye again unto the weak and poor elements to which anew ye desire to be in servitude?

¹⁰ days ye observe, and months, and times, and years!