Saudi-Arabia provided more assistance to Hamas than Iran? Prove? 

In the article it says this
Iran has provided funding to Hamas but more funding has come from Saudi Arabia and also from the Sunni Arab countries like Qatar, UAE etc. and refers to this article: http://www.economist.com/node/12959539?story_id=12959539

But this claim quoted above is not traceable anywhere in the article. Therefore I ask to remove that part, please.