Former FBI Director James Comey apparently has some thoughts about Michael Flynn’s guilty plea.

Friday morning, as the former national security adviser pleaded guilty to lying to the FBI, Comey posted an Instagram photo of babbling water with the caption, “‘But let justice roll down like waters and righteousness like an ever-flowing stream’ Amos 5:24.”

Comey’s post, of course, didn’t explicitly reference Flynn or Special Counsel Robert Mueller’s investigation, which has so far left four people connected to President Trump charged with crimes. But it certainly seems like Comey, who was fired as FBI director in May, is trying to make a point to Trump.

Comey was FBI director until early May, when Trump dismissed him amid a still-ongoing investigation into Russian involvement in the 2016 presidential election. Michael Flynn, a former top aide to Trump, pleaded guilty Friday to lying to the FBI in connection with that investigation.

Get our Politics Newsletter. The headlines out of Washington never seem to slow. Subscribe to The D.C. Brief to make sense of what matters most. Please enter a valid email address. Sign Up Now Check the box if you do not wish to receive promotional offers via email from TIME. You can unsubscribe at any time. By signing up you are agreeing to our Terms of Use and Privacy Policy . This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply. Thank you! For your security, we've sent a confirmation email to the address you entered. Click the link to confirm your subscription and begin receiving our newsletters. If you don't get the confirmation within 10 minutes, please check your spam folder.

Write to Tessa Berenson at tessa.berenson@time.com.