Where did Plato say...?

Question

"Atheism is a disease of the soul before it becomes an error of understanding" (Plato)

I cannot find the source. Where did he say that?

I already looked in: apology, charmides, cratylus, critias, crito, euthydemus, euthyphro, gorgias, ion, laches, laws, lysis, menexenus, meno, parmenides, phaedo, phaedrus, philebus, pophist, protagoras, statesman, symposium, theaetetus, the republic, timaeus.

Answer 1

Probably because it is not from Platon .

Often "great" sayings, that has a temporary evidence in their time to fit reality, projected by their inventor to a famous classis, he/she respected.