Luke 21:8
"And he said, Take heed that ye be not deceived: for many shall come in my name, saying, I am Christ; and the time draweth near: go ye not therefore after them."
Cross References (ranked by relevance)
Let no man deceive you by any means: for that day shall not come, except there come a falling away first, and that man of sin be revealed, the son of perdition;
Let no man deceive you with vain words: for because of these things cometh the wrath of God upon the children of disobedience.
And many false prophets shall rise, and shall deceive many.
For thus saith the LORD of hosts, the God of Israel; Let not your prophets and your diviners, that be in the midst of you, deceive you, neither hearken to your dreams which ye cause to be dreamed.
But evil men and seducers shall wax worse and worse, deceiving, and being deceived.
And they shall say to you, See here; or, see there: go not after them, nor follow them.
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.