Cross reference
Matthew 24:23
23 Then if any man says to you, See, here is the Christ, or, Here; do not put faith in him;
Luke 21:8
8 And he said, Take care that you are not tricked: for a number of people will come in my name, saying, I am he; and, The time is near: do not go after them.
Mark 13:21
21 And then if any man says to you, See, here is Christ; or, See, there; have no faith in it:
Deuteronomy 13:1-3
1 If ever you have among you a prophet or a dreamer of dreams and he gives you a sign or a wonder,
2 And the sign or the wonder takes place, and he says to you, Let us go after other gods, which are strange to you, and give them worship;
3 Then give no attention to the words of that prophet or that dreamer of dreams: for the Lord your God is testing you, to see if all the love of your heart and soul is given to him.
Luke 17:23-24
23 And if they say to you, See, it is there! or, It is here! do not go away, or go after them.
24 For as in a thunderstorm the bright light is seen from one end of the sky to the other, so will the Son of man be when his time comes.
John 5:43
43 I have come in my Father's name, and your hearts are not open to me. If another comes with no other authority but himself, you will give him your approval.