Acts 2:42
They devoted themselves to the apostles' teaching and to the fellowship, to the breaking of bread and to prayer.
1 Corinthians 15:33-34
Do not be deceived: "Bad company corrupts good morals."
2 Corinthians 6:14-18
Do not be yoked together with unbelievers. For what partnership have righteousness and lawlessness? Or what fellowship has light with darkness?
Hebrews 10:24
and let us consider how to stir up one another to love and good works,
Revelation 18:4
Then I heard another voice from heaven, saying, "Come out of her, my people, so that you will not share in her sins and receive of her plagues;