Acts 2:42
And they attended constantly to the teaching of the apostles, and the fellowship, and the breaking of bread, and the prayers.
1 Corinthians 15:33-34
Be not deceived: Evil communications corrupt good manners.
2 Corinthians 6:14-18
Be not unequally yoked together with unbelievers: for what fellowship has righteousness with lawlessness? What communion has light with darkness?
Hebrews 10:24
and let us consider one another that we may excite to love and good works,
Revelation 18:4
And I heard another voice from heaven, saying: Come out of her, my people, lest you become partakers of her sins, and lest you receive of her plagues.