2 Corinthians 11:14

"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."

"Lest Satan should get an advantage of us: for we are not ignorant of his devices."

"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."

"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."