Author Stephen King fired a new salvo in his ongoing feud with President Donald Trump after yet another White House attack on Attorney General Jeff Sessions.

On Monday, Trump taunted his one-time ally ― and early supporter of his presidential campaign ― for conducting investigations into Republican lawmakers because doing so could put two GOP-held House seats in jeopardy:

Two long running, Obama era, investigations of two very popular Republican Congressmen were brought to a well publicized charge, just ahead of the Mid-Terms, by the Jeff Sessions Justice Department. Two easy wins now in doubt because there is not enough time. Good job Jeff...... — Donald J. Trump (@realDonaldTrump) September 3, 2018

The president was referring to Reps. Duncan Hunter (R-Calif.) and Chris Collins (R-N.Y.), both of whom were indicted last month in unrelated cases.

King said Trump’s attack on Sessions should be a lesson to all of the president’s friends:

Today’s lesson: Don’t be Trump’s friend. He will fuck you at the drive-thru if you cross him. Ask Jeff Sessions. — Stephen King (@StephenKing) September 3, 2018

King is among many prominent people who have been blocked by the president for criticizing him on the social media network.

“I might’ve said he had his head somewhere where a certain yoga position would be necessary to get it there,” King told Stephen Colbert earlier this year. “And that was it, man.”