50 Cent's ongoing spat with Floyd Mayweather Jr. just got bigger after the rapper allegedly challenged the boxer to try and read an entire page out of a Harry Potter book - out loud.

On Thursday, August 21, 50 Cent posted two controversial videos via Instagram. In the first video, the "In Da Club" rapper addressed Mayweather's recent statements during an interview with MLive.

"God has blessed me with an unbelievable talent, with fast speed, fast hands, unbelievable defense, and a very, very sharp mind. So I'm thankful for that. Of course, hip-hop artists they come and go. They come and go but I'm still here," Mayweather said on Thursday.

At that time he said, "Hip Hop artists come and go. They come and go but I'm still here." This of course angered 50 Cent who gave him the dirty finger in his video, Syracuse noted.

He wrote, "I just woke up. Floyd you know better don't get me started you paid a private investigator to find miss J. You love her man and Nelly took her. Lmao the nigga swoop down like a bird outta the sky. He to tall champ you can't win. Lol!"

In another post, 50 Cent promised to donate a massive $750,000 if Mayweather agrees to read an entire page out of a Harry Potter book, according to New York Post's Page Six.

He wrote, "Floyd will you except my ALS/ESL CHALLENGE: I will donate $750k to a charity of your choice, if you can read a full page out of a Harry Potter book out loud without starting and stopping or fucking up. Lmao."

This is not the first time that 50 Cent has poked fun at the 37-year-old boxer. In the past, the rapper has been very vocal with siding with his good friend and fellow rapper Nelly whose girlfriend, Shantel Jackson, was previously linked to Mayweather, Page Six noted.