1 Peter 2:16

as free, and not having the freedom as the cloak of the evil, but as servants of God;

Romans 6:22

And now, having been freed from the sin, and having become servants to God, ye have your fruit -- to sanctification, and the end life age-during;

1 Corinthians 7:22

for he who is in the Lord -- having been called a servant -- is the Lord's freedman: in like manner also he the freeman, having been called, is servant of Christ:

James 1:25

and he who did look into the perfect law -- that of liberty, and did continue there, this one -- not a forgetful hearer becoming, but a doer of work -- this one shall be happy in his doing.

Matthew 23:13

'Woe to you, Scribes and Pharisees, hypocrites! because ye shut up the reign of the heavens before men, for ye do not go in, nor those going in do ye suffer to enter.

John 8:32-36

and the truth shall make you free.'

John 15:22

if I had not come and spoken to them, they were not having sin; but now pretext they have not for their sin.

Romans 6:18

and having been freed from the sin, ye became servants to the righteousness.

Galatians 5:1

In the freedom, then, with which Christ did make you free -- stand ye, and be not held fast again by a yoke of servitude;

Galatians 5:13

For ye -- to freedom ye were called, brethren, only not the freedom for an occasion to the flesh, but through the love serve ye one another,

Ephesians 6:6

not with eye-service as men-pleasers, but as servants of the Christ, doing the will of God out of soul,

Colossians 3:24

having known that from the Lord ye shall receive the recompense of the inheritance -- for the Lord Christ ye serve;

1 Thessalonians 2:5

for at no time did we come with speech of flattery, (as ye have known,) nor in a pretext for covetousness, (God is witness!)

James 2:12

so speak ye and so do, as about by a law of liberty to be judged,

2 Peter 2:19

liberty to them promising, themselves being servants of the corruption, for by whom any one hath been overcome, to this one also he hath been brought to servitude,

Jude 1:4

for there did come in unobserved certain men, long ago having been written beforehand to this judgment, impious, the grace of our God perverting to lasciviousness, and our only Master, God, and Lord -- Jesus Christ -- denying,

Treasury of Scripture Knowledge

Summary

As free, and not using your liberty for a cloke of maliciousness, but as the servants of God.

Bible References

A cloke

Matthew 23:14
'Woe to you, Scribes and Pharisees, hypocrites! because ye eat up the houses of the widows, and for a pretence make long prayers, because of this ye shall receive more abundant judgment.
John 15:22
if I had not come and spoken to them, they were not having sin; but now pretext they have not for their sin.
1 Thessalonians 2:5
for at no time did we come with speech of flattery, (as ye have known,) nor in a pretext for covetousness, (God is witness!)

But

Ephesians 6:6
not with eye-service as men-pleasers, but as servants of the Christ, doing the will of God out of soul,
Colossians 3:24
having known that from the Lord ye shall receive the recompense of the inheritance -- for the Lord Christ ye serve;