Romans 6:22

But now being made free from sin - As being free from righteousness is the finished character of a sinner, so being made free from sin is the finished character of a genuine Christian.

And become servants to God - They were transferred from the service of one master to that of another: they were freed from the slavery of sin, and engaged in the service of God.

Fruit unto holiness - Holiness of heart was the principle; and righteousness of life the fruit.