Acts 2:42
and they were persevering in the teaching of the apostles and fellowship, in the breaking of bread, and in 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 participation is there to righteousness and unrighteousness? or what fellowship has light unto darkness?
Hebrews 10:24
and let us recognize one another in the provocation of divine love and good works:
Revelation 18:4
And I heard another voice out of the heaven, saying, Come out from her, my people, in order that you may not partake of her sins, and in order that you may not receive of her plagues;