23 At that time, if anyone says to you, ‘Look, here is the Christ!’ or ‘There He is!’ do not believe it.
Matthew 24:23 Cross References - MSB
Deuteronomy 13:1-3
1 If a prophet or dreamer of dreams arises among you and proclaims a sign or wonder to you,
2 and if the sign or wonder he has spoken to you comes about, but he says, “Let us follow other gods (which you have not known) and let us worship them,”
3 you must not listen to the words of that prophet or dreamer. For the LORD your God is testing you to find out whether you love Him with all your heart and with all your soul.
Mark 13:21
21 At that time if anyone says to you, ‘Look, here is the Christ!’ or ‘There He is!’ do not believe it.
Luke 17:23-24
Luke 21:8
8 Jesus answered, “See to it that you are not deceived. For many will come in My name, claiming, ‘I am He,’ and, ‘The time is near.’ Therefore do not follow them.
John 5:43
43 I have come in My Father’s name, and you have not received Me; but if someone else comes in his own name, you will receive him.