Romans 6:17-19

MKJV(i) 17 But thanks be to our God that you were the slaves of sin, but you have obeyed from the heart that form of doctrine to which you were delivered. 18 Then being made free from sin, you became the slaves of righteousness. 19 I speak in the manner of men because of the weakness of your flesh; for as you have yielded your members as slaves to uncleanness, and to lawless act unto lawless act, even so now yield your members as slaves to righteousness unto holiness.