"On the question of weapons, there's always a possibility, and this has happened time and again, that weapons that we supplied in one battlefield end up in Iranian hands used against us," he said.
"In the Golan Heights, where we're trying to prevent Iran from creating a second Lebanon front, a second terrorist front against us, we encounter Israeli-made weapons." (Related: Ukraine-bound weapons shipments will end up in Iran's hands, former Israeli PM Netanyahu warns.)
His warning came after Ukrainian Foreign Minister Dmytro Kuleba asked Israel for military aid by means of advanced air defense systems that they can use against Russia.
"Ukraine will send an official note to the government of Israel with a request to urgently provide Ukraine with anti-aircraft systems and to start high-quality cooperation in obtaining appropriate technologies for Ukraine," said Kuleba.
"Iran is a red line for Israel. And after Iran has directly become complicit in the crime of aggression against Ukraine, I think anyone in Israel who still has any hesitation about whether or not to help Ukraine, must dispel these hesitations."
Some Israeli politicians apparently agree with Kuleba, saying that Israel should aid Ukraine since Iran is allegedly supporting Russia. An Israeli minister recently called for Jerusalem to provide military aid to Ukraine, although there has been no official announcement from Israel about sending military aid.
Diaspora Minister Nachman Shai said there is no longer any doubt where Israel should stand in the Ukraine conflict with Iran transferring ballistic missiles to Russia. He added that the time has come for Israel to send military aid to Ukraine just as the U.S. and North Atlantic Treaty Organization (NATO) countries have done.
Netanyahu said this is the kind of logic that led to world wars in the past. He thinks constraint is required to avoid World War III.
"I don't think it makes that much difference if it's tactical nuclear weapons or strategic nuclear weapons – that threshold has not been crossed for 77 years. And I think what is required right now is a combination of firmness and prudence to make sure that this conflict ends and certainly doesn't spread," Netanyahu said.
Dmitry Medvedev, former Russian president and a key ally of incumbent President Vladimir Putin, recently warned Israel against sending arms to Ukraine.
"It seems Israel will supply weapons to the Kyiv regime. A very reckless move. It will destroy all diplomatic relations between our countries," said Medvedev, currently the deputy chairman of the Security Council of Russia.
Medvedev's remarks came after streams of explosive-laden suicide drones hit Kyiv, setting buildings on fire and sending people running for cover. Drones used in the attack reportedly include Iranian-made Shaheds.
Ukrainian President Volodymyr Zelensky and other officials have been pressuring Israel for military support since Putin started Russia's invasion on February 24.
Israel has provided shipments of humanitarian aid to Ukraine but has refused Kyiv's requests for defensive weapons.
"Israel gave us nothing. Nothing, zero. I understand they are in a difficult situation with Syria and with Russia. I understand they need to defend their land, but then I got information from my intelligence services that Israel provides [air defenses] to other countries. They can sell, they can export, which is why I am shocked," Zelensky said.
The Times of Israel noted that Israel's refusal to provide weapons to Ukraine is seen as an attempt by Jerusalem to keep its working relationship with Moscow because of Russia's control of Syrian airspace.
Follow WWIII.news for more news about the war in Ukraine.
Watch the video below featuring Zelensky's speech before the Israeli Parliament last March.
This video is from the alltheworldsastage channel on Brighteon.com.