Rapper 50 Cent has offered to give $750,000 (£441,000) to charity if his one-time pal and business partner floyd mayweather, Jr. agrees to read a page from one of J.K. Rowling's Harry Potter books.

50 announced the gamble while taking the ALS Ice Bucket Challenge on Thursday (21Aug14) and posted the footage to his Facebook page.

He said, "This is a special challenge for you, Floyd; if you can read one full page of a Harry Potter book, I'll give $750,000 to whatever charitable organisation you want to (sic)."

He also captioned the video, "read a full page out of a Harry Potter book out loud without starting and stopping or f**king up".

The rapper used to be close friends with the boxing champ but they split over business differences while attempting to create a sports empire.