Acts 2:42
And these [new converts] continued regularly [to listen] to the teaching of the apostles and to share with them; they broke bread [in memory of Jesus] and continued praying.
1 Corinthians 15:33-34
Do not be fooled; bad company ruins good moral behavior.
2 Corinthians 6:14-18
Do not team up with unbelievers [i.e., in close relationships, such as marriage, etc.]. For what do righteousness and wickedness have in common? Or, what fellowship can light have with darkness?
Hebrews 10:24
And we should consider how we can stir up one another to love [more] and to perform good deeds.
Revelation 18:4
Then I heard another voice from heaven, saying, "Come out of her, my people, so that you do not share in her sins, and so that you do not receive her plagues [i.e., judgments].