Mark 13:21

And then if any man shall say to you ,.... During those days of tribulation and affliction, or when shortened and at an end:

lo! here is Christ, or lo! he is there ; the Messiah has appeared in such or in such a place, to deliver you from your national distresses and calamities, and from the Roman yoke and bondage:

believe him not ; give no credit to such a report, for the reason following; See Gill on Matthew 24:23 .