Matthew 7:13-14
Enter ye in thro' the straight gate: for wide is the gate and broad is the way that leadeth to destruction, and many there are that go in thro' it:
Luke 13:24
And he said to him, Strive to enter in thro' 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 perverse generation.
2 Corinthians 6:17
Therefore come out from among them, and be ye separate, and touch not the unclean person, saith the Lord, and I will receive you,
Revelation 18:4
And I heard another voice out of heaven, saying, Come out of her my people, that ye be not partakers of her sins, and that ye receive not of her plagues.