Israel Defense Forces released Sunday raw video footage it says its troops recovered in Gaza that shows former Israeli hostages 8-year-old Ela Elyakim and her 15-year-old sister Dafna Elyakim being forced by Hamas terrorists to film repeatedly.

"The video, which is being released today for the first time was intended to be used by Hamas for psychological terror," Rear Adm. Daniel Hagari, an IDF spokesperson, said in a statement. "But Ela’s family asked us to share it with the world to expose Hamas's terror, to expose Hamas's cruelty, to expose Hamas's barbarism."

Hagari said the raw footage of the girls recording the video was recovered by IDF troops during Israel's ground operations in Gaza.

The Elyakim sisters were kidnapped on Oct. 7 from their father's house in Nahal Oz, according to the IDF. Their father was killed in the surprise attack on Israel by Hamas terrorists, according to the IDF.

Ela and Dafana Elyakim were held hostage for 51 days before Hamas released them in a previous hostage deal, the IDF said.

Ela Elyakim told IDF officials that Hamas terrorists forced her to read from a script and made her change clothes multiple times as they refilmed the video over and over, according to Hagari.

"We will continue doing everything in our power to bring our hostages back home," said Hagari.

-ABC News' Victoria Beaule

House Republican Conference Chairwoman Elise Stefanik of New York will be giving remarks in the Israeli Knesset on Sunday, according to her office. Stefanik will be the highest-ranking member of the House to visit Israel following the Oct. 7 attack.

Stefanik plans to slam President Joe Biden for recently halting some military aid to Israel, according to excerpts of her speech reviewed by ABC News.

"I have been clear at home, and I will be clear here: There is no excuse for an American president to block aid to Israel," Stefanik will say during the address.

Biden announced the U.S. would withhold certain bomb deliveries to Israel over fear they could be used in Rafah, but the Biden administration informed Congress it's moving forward with more than $1 billion in new arms agreements with Israel.

The congresswoman will address the rise in antisemitism in the U.S., House Republicans' support for Israel and even mention her close ally, former President Donald Trump.

"I have been a leading proponent and partner to President Trump in his historic support for Israeli independence and security," Stefanik will say.

-ABC News' Lauren Peller

Three U.S. medical professionals remain in Gaza despite warnings from the U.S. State Department that the American government may not be able to get them out later.

Tamer Hassan, a registered nurse, Dr. Jomana Al-Hinti and Dr. Adam Hamawy were the only ones out of a group of 20 American medical professionals who stayed behind to help treat patients.

"They understand that the U.S. embassy may not be able to facilitate their departure in the same manner as we have just effected today," a person with knowledge of the situation told ABC News.

Hamawy released a statement Saturday explaining why he stayed behind.

"We worry that the European Hospital we currently are in will suffer a similar fate of Al-Shifa and Nasser hospitals, where humanitarian workers, patients, and civilians were massacred," he said.

"To my wife, daughters and son, I know it hurts that I am not coming home this weekend, and I am sorry. But I know that you are proud that I am upholding my oath to never leave anyone behind," he added.

The doctors who left Gaza "made their way to safety with assistance from the U.S. Embassy in Jerusalem," a State Department spokesman said.

-ABC News' Anne Flaherty, Nadine Shubailat and Zoe Magee

Israeli cabinet minister Benny Gantz has given Israeli Prime Minister Benjamin Netanyahu an ultimatum: approve a post-war plan by June 8, or he will resign, Gantz said at a press conference.

"While the Israeli soldiers show supreme bravery on the front, some of the men who sent them into battle behave with cowardice and irresponsibility," Gantz said.

A leader of the National Unity Party and a minister in the war cabinet, Gantz's resignation would not necessarily trigger the collapse of the government on its own, but would be politically significant.

The ultimatum come on the heels of a speech by defense minister Yoav Gallant, who is demanding a plan for the "day after" the war.

-ABC News' Jordana Miller and Dana Savir