“We are sending this grievance to say that you cannot engage in xenophobia, bigotry, hate and get away with it. Such behavior should never be tolerated,” Mr. Espaillat said on Thursday.

In the letter addressed to the chief attorney of the grievance committee, Jorge Dopico, Mr. Espaillat and Mr. Diaz called the video “vile,” and said “The audacity to profile and verbally assault innocent bystanders and customers in a public commercial location is a violation of our civil society. We watched Aaron’s video and we were disgusted.”

On Tuesday, Mr. Schlossberg’s verbal assault was captured in a video that was widely shared and condemned on social media. He was angry that staff members preparing food were speaking Spanish to customers, when, he said disdainfully, they “should be speaking English.” He threatened to call the Immigration and Customs Enforcement agency to deport them, assuming that they were undocumented immigrants merely because of the language they spoke.

“It’s America,” he said, scoffing. “I will be following up, and my guess is they’re not documented. So my next call is to ICE to have each one of them kicked out of my country.”

Mr. Schlossberg did not return messages from The New York Times on Wednesday or Thursday.

According to the Court System, Mr. Schlossberg was admitted to the bar in 2003 and had no record of public discipline. He is the founder of his own firm.