Acts 2:42
They devoted themselves to the instruction given by the apostles and to fellowship, breaking bread and praying together.
1 Corinthians 15:33-34
Make no mistake about this: 'bad company is the ruin of good character.'
2 Corinthians 6:14-18
[Keep out of all incongruous ties with unbelievers. What have righteousness and iniquity in common, or how can light associate with darkness?
Hebrews 10:24
and let us consider how to stir up one another to love and good deeds ??25 not ceasing to meet together, as is the habit of some, but admonishing one another, all the more so, as you see the Day coming near.
Revelation 18:4
And I heard another voice from heaven crying, "Come out of her, O my people, that you share not her sins, that you partake not of her plagues: