Luke 1:74-75
to grant us deliverance from the dreaded hand of our foes, so that we could serve Him
Romans 6:14
For sin must not any longer exert its mastery over you, for now you are not living as slaves to law but as subjects to God's favor.
Romans 6:17-18
But, thank God, that though you once were slaves of sin, you became obedient from your hearts to that form of teaching in which you have been instructed,
Romans 6:22
But now, since you have been freed from sin and have become the slaves of God, the immediate result is consecration, and the final destiny is eternal life.
1 Corinthians 7:22-23
For the slave who has been called to union with the Lord is the Lord's freedman; in the same way the freeman who has been called is a slave of Christ.
1 Corinthians 9:19
Yes, indeed, though I am free from any human power, I have made myself a slave to everybody, to win as many as possible.
1 Corinthians 9:21
to men who have no written law, like one without any law, though I am not without God's law but specially under Christ's law, to win the men who have no written law.
Galatians 5:13
For you, brothers, were called to freedom; only you must not let your freedom be an excuse for the gratification of your lower nature, but in love be slaves to one another.