He had a LOT to say about the Jews. The link shared here is to an uncensored version of Voltaire's Philosophical Dictionary, specifically the section containing his chapter on the jewish people.
As far as the quote goes, after extensive research I have determined that it was originally made by Kevin Alfred Strom, the details of which are available online. The misquote was first propogated by an as of yet unidentified entity (that is to say I haven't identified the source) during the Dieudonné affair and trial in 2014, which is probably where I got the quote since I followed that closely. It was again shared in 2015 by an Australian Senator named Cory Bernardi and was spread pretty widely.
