Israel is unlikely to carry out a strike on Iran until after Passover, a senior U.S. official told ABC News, although that could always change.

Passover begins on Monday and ends after nightfall on April 30.

The Iranian Islamic Revolutionary Guard Corps and other leadership are still on a high state of alert, with some in safe houses and underground facilities, the official said.

Israel prepared for and then aborted retaliatory strikes against Iran on at least two nights this past week, three Israeli sources told ABC News.

Iran attacked Israel with more than 300 drones and missiles on Saturday night into Sunday morning local time in Israel. Israel has been weighing how and when to respond to Iran's attack since then, holding war cabinet meetings on Sunday, Monday and Tuesday.

The members of the Israeli war cabinet are Israeli Prime Minister Benjamin Netanyahu, Minister Benny Gantz and Defense Minister Yoav Gallant.

A range of responses have been presented to the Israeli war cabinet. The potential responses include options ranging from attacking Iranian proxies in the region but not on Iranian soil to a potential cyber attack, sources told ABC News.

There was no war cabinet meeting on Wednesday, but Netanyahu told his government cabinet that while he appreciates the advice from allies, Israel will "make our own decisions, and the State of Israel will do everything necessary to defend itself."

-ABC News' Matt Gutman and Jordana Miller

Iranian President Ebrahim Raisi said at an army parade Wednesday that "the tiniest invasion" from Israel will be met with a "very massive and harsh response."

House Republicans have posted the legislative text for three national security bills, addressing Ukraine, Israel and the Indo-Pacific.

For Israel, lawmakers have crafted a package totaling $14.1 billion, including: $4 billion for missile defense; $1.2 billion for Iron Beam; $4 billion replenishment of stocks to the Department of Defense; and $3.5 billion for Israel to purchase U.S. weapons.

"The House must pass the package this week and the Senate should quickly follow," President Joe Biden said in a statement. "I will sign this into law immediately to send a message to the world: We stand with our friends, and we won’t let Iran or Russia succeed."

Votes are expected in the House on Thursday, Friday and Saturday.

White House National Security Council spokesman John Kirby told ABC's "Good Morning America" Sunday that any response to Iran's Saturday night attack is up to Israeli forces.

But Kirby stressed that President Joe Biden does not want the situation to escalate or have the U.S. drawn further into any conflict.

When asked by ABC News' Whit Johnson about a response from Israel, Kirby said that it is up to the Israeli government to decide how to respond. He added that "the damage was extremely light," and the defenses in place proved Israel can defend itself.

"I won't speak for the Israelis. It's going to be up to them to decide whether and how they'll respond to this," Kirby said. "They showed last night, an incredible military capability on their own, but certainly in concert with friends."

When pressed about reports that Biden told Israeli Prime Minister Benjamin Netanyahu the U.S. would oppose a counterattack on Iran, Kirby said it was "not an accurate reading" of the president's message. He emphasized that the White House does not "want to see the situation escalate further."

"The president understands the prime minister runs a government for a sovereign state of Israel, and that they'll decide whether and how they're going to respond to what Iran did last night," Kirby said.

Kirby reiterated the White House's message that the president will do "whatever he has to protect our troops and our facilities, our people in the region." He said there is no current threat to U.S. service members and facilities, noting that more U.S. forces moved into the region after Oct. 7 to help defend Israel and shipping channels in the Red Sea.

"We're going to obviously be vigilant to any potential threat to our forces in the region," Kirby said. "But the president has been clear we are not looking for a wider war. We're not looking for a second front or a third front. We're not looking to see escalation and we're certainly not looking for a war with Iran."

Kirby added that good intelligence about the attack helped the U.S. and Israel prepare.

"We've been watching as closely as we could the intelligence picture, we had a pretty good indication of the size and the scale and the scope of what Iran was planning," Kirby said. "That is why, because we had a good sense of what they were going to do and with how much, we were able to really help Israel knock down almost everything that Iran threw at them."