Galatians 4:8
"Howbeit then, when ye knew not God, ye did service unto them which by nature are no gods."
Cross References (ranked by relevance)
As concerning therefore the eating of those things that are offered in sacrifice unto idols, we know that an idol is nothing in the world, and that there is none other God but one.
Not in the lust of concupiscence, even as the Gentiles which know not God:
For they themselves shew of us what manner of entering in we had unto you, and how ye turned to God from idols to serve the living and true God;
In flaming fire taking vengeance on them that know not God, and that obey not the gospel of our Lord Jesus Christ:
Have ye not cast out the priests of the LORD, the sons of Aaron, and the Levites, and have made you priests after the manner of the nations of other lands? so that whosoever cometh to consecrate himself with a young bullock and seven rams, the same may be a priest of them that are no gods.
For after that in the wisdom of God the world by wisdom knew not God, it pleased God by the foolishness of preaching to save them that believe.
For the time past of our life may suffice us to have wrought the will of the Gentiles, when we walked in lasciviousness, lusts, excess of wine, revellings, banquetings, and abominable idolatries:
And have cast their gods into the fire: for they were no gods, but the work of men’s hands, wood and stone: therefore they have destroyed them.
Having the understanding darkened, being alienated from the life of God through the ignorance that is in them, because of the blindness of their heart:
And if it seem evil unto you to serve the LORD, choose you this day whom ye will serve; whether the gods which your fathers served that were on the other side of the flood, or the gods of the Amorites, in whose land ye dwell: but as for me and my house, we will serve the LORD.
And Pharaoh said, Who is the LORD, that I should obey his voice to let Israel go? I know not the LORD, neither will I let Israel go.
Ye know that ye were Gentiles, carried away unto these dumb idols, even as ye were led.
Pour out thy fury upon the heathen that know thee not, and upon the families that call not on thy name: for they have eaten up Jacob, and devoured him, and consumed him, and have made his habitation desolate.
And Joshua said unto all the people, Thus saith the LORD God of Israel, Your fathers dwelt on the other side of the flood in old time, even Terah, the father of Abraham, and the father of Nachor: and they served other gods.
And changed the glory of the uncorruptible God into an image made like to corruptible man, and to birds, and fourfooted beasts, and creeping things.
For as I passed by, and beheld your devotions, I found an altar with this inscription, TO THE UNKNOWN GOD. Whom therefore ye ignorantly worship, him declare I unto you.
And even as they did not like to retain God in their knowledge, God gave them over to a reprobate mind, to do those things which are not convenient;
And they called Barnabas, Jupiter; and Paul, Mercurius, because he was the chief speaker.
Hath a nation changed their gods, which are yet no gods? but my people have changed their glory for that which doth not profit.
He was in the world, and the world was made by him, and the world knew him not.