Romans 6:18
"Being then made free from sin, ye became the servants of righteousness."
Cross References (ranked by relevance)
But now being made free from sin, and become servants to God, ye have your fruit unto holiness, and the end everlasting life.
For the law of the Spirit of life in Christ Jesus hath made me free from the law of sin and death.
Stand fast therefore in the liberty wherewith Christ hath made us free, and be not entangled again with the yoke of bondage.
And ye shall know the truth, and the truth shall make you free.
For sin shall not have dominion over you: for ye are not under the law, but under grace.
For he that is dead is freed from sin.
No weapon that is formed against thee shall prosper; and every tongue that shall rise against thee in judgment thou shalt condemn. This is the heritage of the servants of the LORD, and their righteousness is of me, saith the LORD.
As free, and not using your liberty for a cloke of maliciousness, but as the servants of God.
And I will walk at liberty: for I seek thy precepts.
I will run the way of thy commandments, when thou shalt enlarge my heart.
O LORD our God, other lords beside thee have had dominion over us: but by thee only will we make mention of thy name.
O LORD, truly I am thy servant; I am thy servant, and the son of thine handmaid: thou hast loosed my bonds.
If the Son therefore shall make you free, ye shall be free indeed.