The Office of Government Ethics appeared to throw some shade at President Trump Friday over reports that Trump asked fired FBI Director James Comey for his "loyalty" at a private dinner.

Responding on Twitter, the ethics office tweeted a black image that reads, "Public service is a public trust, requiring employees to place loyalty to the Constitution, the law and ethical principles above private gain."

White House press secretary Sean Spicer on Friday denied that Trump had asked for Comey's loyalty.

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The tweet wouldn't be the first time a government agency has used its official Twitter account to troll President Trump. In January, an employee for the National Parks Service posted a tweet that went viral comparing Trump's inauguration crowd sizes to those of former President Barack Obama Barack Hussein ObamaGOP senator blocks Schumer resolution aimed at Biden probe as tensions run high D-Day for Trump: September 29 Obama says making a voting plan is part of 'how to quarantine successfully' MORE.

The ethics office has criticized Trump in the past.

The head of the office, Director Walter Shaub, in January slammed Trump's plan to separate himself from his business empire as president, calling it “wholly inadequate” in resolving potential conflicts of interest. Schaub was appointed by Obama.