Berean Study Bible
But thanks be to God that, though you once were slaves to sin, you wholeheartedly obeyed the form of teaching to which you were committed.

King James Bible
But God be thanked, that ye were the servants of sin, but ye have obeyed from the heart that form of doctrine which was delivered you.

American Standard Version
But thanks be to God, that, whereas ye were servants of sin, ye became obedient from the heart to that form of teaching whereunto ye were delivered;

Darby Bible Translation
But thanks [be] to God, that ye were bondmen of sin, but have obeyed from the heart the form of teaching into which ye were instructed.

Douay-Rheims Bible
But thanks be to God, that you were the servants of sin, but have obeyed from the heart, unto that form of doctrine, into which you have been delivered.

English Revised Version
But thanks be to God, that, whereas ye were servants of sin, ye became obedient from the heart to that form of teaching whereunto ye were delivered;

Young's Literal Translation
and thanks to God, that ye were servants of the sin, and -- were obedient from the heart to the form of teaching to which ye were delivered up;