A prominent Muslim group is urging Muslim women to speak out against Republican presidential nominee Donald Trump Donald John TrumpBiden leads Trump by 36 points nationally among Latinos: poll Trump dismisses climate change role in fires, says Newsom needs to manage forest better Jimmy Kimmel hits Trump for rallies while hosting Emmy Awards MORE after he asked if Ghazala Khan, the mother of a slain U.S. soldier, was silent during her husband’s speech at the Democratic National Convention because she was not “allowed” to speak.

The Council on American-Islamic Relations is asking Muslim women to “tweet about who they are and how they speak out,” according to a press release.

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The social media campaign will take place on Monday between 10 a.m. and 1 p.m., and will use the hashtag #CanYouHearUsNow.

Last Thursday, Khan stood silently by her husband, Khizr Khan, as he spoke about their son, a U.S. soldier who was killed in 2004 in Iraq.

Khizr Khan also slammed Trump for his comments about Muslims throughout his presidential campaign, asking him if he had ever read the Constitution.

Trump responded, in part, by questioning why Ghazala Khan did not speak during the convention.

“She probably — maybe she wasn’t allowed to have anything to say. You tell me,” Trump said in an interview with ABC’s “This Week.”

In an op-ed in The Washington Post on Sunday, Ghazala Khan wrote that she didn’t want to speak during the convention because she was too emotional.

“Walking onto the convention stage, with a huge picture of my son behind me, I could hardly control myself,” she wrote. “What mother could? Donald Trump has children whom he loves. Does he really need to wonder why I did not speak?”

CAIR called on Trump to apologize for his remarks “disparaging Ghazala Khan” and his “repeated use and promotion of anti-Muslim stereotypes.”