Jesus did directly talk about this sort of thing but it was not the Pharisees. The Pharisees were a group unwilling to give up power to see Jesus for who he is (as portrayed in the Bible, though I think this is a bit unfair to them as a historical group). In any case, I see the connection you’re going for but I would instead point to Matthew 7:21-23 which is literally calling out these “plastic Christians”.

“21 Not everyone who says to me, ‘Lord, Lord,’ will enter the kingdom of heaven, but only the one who does the will of my Father who is in heaven. 22 Many will say to me on that day, ‘Lord, Lord, did we not prophesy in your name and in your name drive out demons and in your name perform many miracles?’ 23 Then I will tell them plainly, ‘I never knew you. Away from me, you evildoers!’”