2 Corinthians 11:14
"And no marvel; for Satan himself is transformed into an angel of light."
Cross References (ranked by relevance)
Galatians 1:8
26
But though we, or an angel from heaven, preach any other gospel unto you than that which we have preached unto you, let him be accursed.
2 Corinthians 2:11
20
Lest Satan should get an advantage of us: for we are not ignorant of his devices.
2 Corinthians 11:3
13
But I fear, lest by any means, as the serpent beguiled Eve through his subtilty, so your minds should be corrupted from the simplicity that is in Christ.
Revelation 12:9
And the great dragon was cast out, that old serpent, called the Devil, and Satan, which deceiveth the whole world: he was cast out into the earth, and his angels were cast out with him.