President Donald Trump’s decision that he announced in a tweet last month to recognize Israeli sovereignty over the disputed Golan Heights territory marked a dramatic shift in decades of U.S. policy. And he revealed on Saturday that the controversial move was made quickly — after he’d received a “little history” lesson from his advisors.

Trump told a gathering of the Republican Jewish Coalition that he’d been speaking to his son-in-law and senior advisor, Jared Kushner, as well as U.S. ambassador to Israel David Friedman and his Israel adviser, Jason Greenblatt, over the phone about an unrelated issue when he suddenly brought up the Golan Heights, The Times of Israel reported.

“I said, ‘Fellows, do me a favor. Give me a little history, quick. Want to go fast. I got a lot of things I’m working on: China, North Korea. Give me a quickie,’” Trump recalled of the conversation.

After the advisers filled him in, Trump said he asked Friedman: “David, what do you think about me recognizing Israel and the Golan Heights?”

Friedman, apparently surprised by the suggestion, reacted like a “wonderful, beautiful baby,” Trump said, and asked if he would “really ... do that.”

“Yeah, I think I’m doing it right now. Let’s write something up,” Trump said he responded, prompting applause and cheers from his audience in Las Vegas. “We make fast decisions and we make good decisions.”