Berean Study Bible
Formerly, when you did not know God, you were slaves to those who by nature are not gods.

King James Bible
Howbeit then, when ye knew not God, ye did service unto them which by nature are no gods.

American Standard Version
Howbeit at that time, not knowing God, ye were in bondage to them that by nature are no gods:

Darby Bible Translation
But then indeed, not knowing God, ye were in bondage to those who by nature are not gods;

Douay-Rheims Bible
But then indeed, not knowing God, you served them, who, by nature, are not gods.

English Revised Version
Howbeit at that time, not knowing God, ye were in bondage to them which by nature are no gods:

Young's Literal Translation
But then, indeed, not having known God, ye were in servitude to those not by nature gods,