Billionaire hedge-fund manager David Tepper went off on Republican nominee Donald Trump in a CNBC interview on Monday, slamming the real estate mogul for a lack of charitable giving.

Tepper said he lost all patience after watching Trump’s wife, Melania, introduce the candidate as a generous and giving person at a campaign event over the weekend. Tepper charged that Trump, despite having large business operations in New Jersey, never contributed in the wake of the financial crisis or other disasters.

“During Sandy, the big Sandy benefit, the big 9/11 benefit, not one dime. Not one dime!,” Tepper said in the phone interview, his voice rising. “You can’t tell me this is a charitable, generous person.”

Tepper said Trump “masquerades as an angel of light, but he is a father of lies.”

In a subsequent appearance on CNBC, Trump campaign manager Kellyanne Conway disputed Trump’s alleged parsimony, saying Trump “has been very generous with his time and his money over a number of decades…I’ve witnessed it first hand.”

Tepper, the founder of Appaloosa Management, has prided himself on his own charitable contributions. Since 2008, Tepper has given around $70 million to New Jersey-based charities, according to CNBC. Tepper’s net worth is estimated at around $11.4 billion by Forbes.

Tepper, who supported Democrat Barack Obama in 2008 and Republican challenger Mitt Romney in 2012, said he would be voting for Democrat Hillary Clinton but supporting Republican candidates down ticket, saying he thought the best combination would be a Clinton presidency and a Republican-controlled Congress.

It was hardly an enthusiastic endorsement of Clinton. Tepper said U.S. voters are faced with “two people who have judgment issues.”

Tepper said he has a longer position in stocks than he did when he appeared on CNBC a few weeks ago. At that time, Tepper said he was “pretty cautious” on the stock market but wasn’t an outright bear.