Khizr Khan, father of Army Capt. Humayun Khan, who was killed in Iraq in 2004 at the age of 27, took Donald Trump to task in his speech Thursday night at the Democratic National Convention in Philadelphia.

"Tonight we are honored to stand here as parents of Captain Humayun Khan and as patriotic American Muslims," Kahn said, joined onstage by his wife. Khan, who was born in Pakistan, is a legal consultant in Virginia.

"Donald Trump consistently smears the character of Muslims," Kahn said. "He disrespects other minorities, women, judges, even his own party leadership."

"Donald Trump, you are asking Americans to trust you with their future," Kahn said. "Let me ask you, have you even read the United States Constitution? I will gladly lend you my copy," he said, pulling a booklet from his coat pocket.

"In this document, look for the words 'liberty' and 'equal protection of law.'"

Viewers expressed on Twitter how they were moved by Khan's speech.

Watch the full speech below:

Read more: