First Lady Michelle Obama referenced Donald Trump’s Twitter account during an emotional speech Monday evening at the Democratic National Convention.

Obama’s 14-minute speech, which garnered plenty of praise on social media, included a subtle jab at Donald Trump and his active Twitter account.

“I want someone with the proven strength to persevere, someone who knows this job and takes it seriously, someone who understands that the issues a president faces are not black and white and cannot be boiled down to 140 characters,” Obama said on Monday. “Because when you have the nuclear codes at your fingertips and the military in your command, you can’t make snap decisions. You can’t have a thin skin or a tendency to lash out. You need to be steady and measured and well-informed.”

Trump’s account was active during the first night of the Democratic National Convention, but the Republican presidential candidate did not send out any tweets about Obama’s speech as of 9:30 p.m. PT Monday.

It’s a nice bit of free advertising for Twitter, which live-streamed the event thanks to a deal it inked with CBS. The social media giant, which reports its quarterly earnings Tuesday, has partnered with several companies over the past few months to stream live sports and political content as it tries to add new users amid a slumping stock price.

Despite shares being down nearly 50 percent in the past year, the reference to Twitter’s platform tonight shows that the company’s brand is still very much relevant — whether or not that leads to more revenue for Twitter is another story.

Barack Obama, meanwhile, shared his support via Twitter on Monday:

Obama’s speech, which did not mention Trump’s name, focused on American children and why voters should pick Hillary Clinton as their next leader over Trump. You can read it here, or watch it here:

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