President Trump said Thursday at the inaugural Board of Peace meeting at the U.S. Institute of Peace in Washington, D.C., that "the war in Gaza is over."

Trump invited dozens of countries to participate in the Board of Peace and help end the war between Israel and Hamas.

"The war in Gaza is over. It’s over," Trump said, adding that, still, "there are little flames," NBC News reported.

"Hamas has been, I think they’re going to give up their weapons, which is what they promised," Trump said. "If they don’t, it’ll be, you know, they’ll be harshly met, very harshly met. They don’t want that."

The president explained that the U.S. would contribute $10 billion to the Board of Peace.

"We've had great support for that number," he said. "And that number is a very small number when you look at that compared to the cost of war."

He also said that the leaders of several nations, including Kazakhstan, Azerbaijan, the United Arab Emirates, Morocco, Bahrain, Qatar, Saudi Arabia, Uzbekistan, and Kuwait "have all contributed more than $7 billion toward the relief package."

"That's great, thank you, fellas," Trump said, adding that, "and many more are contributing ... this is our first meeting."

The president noted that Indonesia, Morocco, Albania, Kosovo, and Kazakhstan "have all committed troops and police to stabilize Gaza."

He said that other nations, like Egypt and Jordan, "are likewise providing very, very substantial help," to create "a very trustworthy Palestinian police force."

Trump called the Board of Peace "one of the most important and consequential things" he has been involved in and touted the countries and leaders who are participating. He was also optimistic that other countries invited to the Board of Peace would accept the U.S.'s offer after multiple key allies declined invitations.

"Almost everybody’s accepted, and the ones that haven’t will be," Trump said. "Some are playing a little cute. Doesn’t work. You can’t play cute with me."

The United Kingdom, France, Norway, Sweden, and Slovenia are among the countries that have said they won't join, partly due to concerns that it could diminish the United Nations.

However, Trump said during his speech that Norway agreed to host a Board of Peace event.

"I'm excited to announce that Norway has agreed to host an event bringing together the Board of Peace," Trump said.

As Norway previously indicated that it would not immediately join the Board of Peace, it is unclear if the country's stance has changed.