1 Peter 1:15-16
but--in imitation of the holy One who has called you--you also must be holy in all your habits of life.
Matthew 5:48
You however are to be complete in goodness, as your Heavenly Father is complete.
2 Corinthians 6:14-16
Do not come into close association with unbelievers, like oxen yoked with asses. For what is there in common between righteousness and lawlessness? Or what partnership has light with darkness?
2 Corinthians 7:1
Having therefore these promises, beloved friends, let us purify ourselves from all defilement of body and of spirit, and secure perfect holiness through the fear of God.