(CNN)Donald Trump rejected a Muslim lawyer's assertion on the Democratic convention stage that the Republican nominee has "sacrificed nothing and no one."

"Who wrote that? Did Hillary's script writers write it?" Trump said in an interview with with ABC News' George Stephanopoulos that will air Sunday. "I think I've made a lot of sacrifices. I work very, very hard."

Khizr Khan, whose son Army Capt. Humayun Khan died in Baghdad in 2004, delivered one of the most powerful speeches of the Democratic National Convention. With his wife Ghazala at his side, Khan repeatedly blasted Trump's immigration proposals -- specifically those aimed at barring Muslims -- and said the billionaire businessman has "sacrificed nothing and no one."

Trump, in the ABC interview, said in response, "I've created thousands and thousands of jobs, tens of thousands of jobs, built great structures. I've had tremendous success. I think I've done a lot."