Matthew 7:13-14
Enter in through the strait gate: for wide is the gate, and broad is the way, that leads to destruction; and many there are that go in through it.
Luke 13:24
Strive to enter in through the strait gate; for many, I say to you, will seek to enter in, and shall not be able.
Acts 2:40
And with many other words did he testify and exhort, saying: Save yourselves from this wicked generation.
2 Corinthians 6:17
For this reason, come out from among them, and separate yourselves, says the Lord, and touch not an unclean person, and I will receive you;
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.