Parallel
Galatians 4:3
Nestle 1904 Greek New Testament · Berean Standard Bible
οὕτως καὶ ἡμεῖς ὅτε ἦμεν νήπιοι ὑπὸ τὰ στοιχεῖα τοῦ κόσμου ἤμεθα δεδουλωμένοι
So also, when we were children, we were enslaved under the basic principles (note: Or elemental forces; similarly in verse 9) of the world.