Donald Trump filed a lawsuit Monday in California against liberal comic Bill Maher, suing him for $5 million after Trump says Maher did not follow through on a $5 million public bet he made on “The Tonight Show.”

“I don’t know whether this case will be won or lost, but I felt a major obligation to bring it on behalf of the charities,” Trump said in a public statement first obtained by POLITICO.

Last month, Maher said on NBC to Jay Leno that he would pay $5 million to Trump’s charity of choice if he provided a birth certificate proving that he’s not “spawn of his mother having sex with orangutan.” It was similar to an offer Trump made to President Barack Obama during the presidential campaign season, in which Trump wanted Obama to release his college records.