Don Cheadle made a huge claim about President Donald Trump on Sunday, when he tweeted that the commander in chief once used a racial slur in front of a friend’s father.

When a Twitter follower praised him for being outspoken about Trump’s administration, the “Ocean’s Eleven” star replied:

Hated him since he asked my friend's father at a Doral pro-am if he'd ever "f*cked a nigger..." Did it for me ... https://t.co/ypCNEPldH5 — Don Cheadle (@DonCheadle) March 4, 2017

Cheadle went on to say that he’s never mentioned the incident, which allegedly took place at Trump’s luxury resort in Doral, Florida, because he felt that it would do little to change the outcome of the election.

Many already know this to be in his nature. It's not hidden. And those who can't see it, might never. The story would have changed little. https://t.co/MoVVaTIwgb — Don Cheadle (@DonCheadle) March 4, 2017

Her father wasn't wearing a wire. But look up the 2M or so articles about Drumpf and racism if you need a primer. Start with his own book. https://t.co/nUhcQNqK1n — Don Cheadle (@DonCheadle) March 5, 2017

The actor maintained that his claims are true, but did not elaborate on when the alleged incident actually occurred. He then launched into several tweets about how “we’ve all” been in a situation where we’ve heard something offensive but failed to speak up in the moment.

“Same thing here,” Cheadle tweeted. “A father repeating it to his daughter with both disbelief of hearing the words and regret that he stayed quiet and minded his own business. Like that.”

Trump has yet to respond to Cheadle’s claims.