Luke 13:27

“And he will say, ‘I tell you, I do not know from where you are. Depart from me, all you workers of iniquity.' ”

And His reply is simply, that He does not know from where they are. They are strangers to Him, for they are workers of iniquity. They have dwelt in places where He would not venture. They have done things that He could not condone. And by their behaviour they have revealed themselves as strangers to Him, as having no part in Him. They are known by their fruits.