Try the 6 billion dollars Joe just gave Iran, and do a search using this topic: "Iran is the biggest supporter of, and supplier of money and arms to Hamas, and other terrorist organizations"
You'll find plenty of sources.
That is not a source. yes he gave them the money back which he shouldn’t have done. A source would ne an informed operative or country saying Iran gave or sold them the rockets they just shot into Israel. That is a source, not anonymous people on the internet, I may agree with.