The Council on American-Islamic Relations is urging Muslim women to speak out against Donald Trump after the Republican nominee suggested that Ghazala Khan, the wife of Khizr Khan, was silent during his speech at the Democratic National Convention last week because she was forbidden from saying anything.

The Khans' son was killed in 2004 while serving as a U.S. soldier in Iraq.

CAIR put out a press release Sunday urging Muslim women activists to take to Twitter between 10 a.m. and 1 p.m. EDT Monday to tweet "about who they are and how they speak out," using the hashtag #CanYouHearUsNow.

The group also demanded that Trump apologize for "disparaging" both parents of a Muslim who died while serving in the U.S. Army in Iraq. Both are Gold Star members, a support group for families who lost loved ones in war.

"As the leader of America's largest Muslim civil rights organization, I urge Donald Trump to apologize for his shameful remarks disparaging a Muslim Gold Star family and for his repeated use and promotion of anti-Muslim stereotypes," said CAIR Board Chair Roula Allouch. "Just as Donald Trump must apologize for his un-American remarks, Republican Party leaders must finally repudiate their candidate's divisive rhetoric."

While Ghazala Khan did not say a word as she stood beside her husband during his DNC address, she revealed Sunday in an op-ed that what Trump suggested about her simply was untrue and that she chose not to speak.