Romans 6:20

for when ye were the vassals of sin, ye were not in the service of virtue.

Romans 6:16-17

by no means. know ye not, that to whom ye subject your selves vassals at command, his vassals you are whom you thus obey; the vassals either of sin to destruction, or of obedience to justification?

John 8:34

Jesus answered them, I declare unto you, whosoever committeth sin, is a slave to sin.

Treasury of Scripture Knowledge

Summary

For when ye were the servants of sin, ye were free from righteousness.

The servants

General references

Bible References

The servants

Romans 6:16
by no means. know ye not, that to whom ye subject your selves vassals at command, his vassals you are whom you thus obey; the vassals either of sin to destruction, or of obedience to justification?
John 8:34
Jesus answered them, I declare unto you, whosoever committeth sin, is a slave to sin.

General references

Colossians 3:7
among whom you had your conversation, when you followed their practices.