There not too many details available at this time, but the IDF has announced several times that it has captured massive amounts of military equipment, weapons, armaments, from Hezbollah in Lebanon. Much of the weaponry captured was supplied originally by Russia. 

The question is what to do with all that [possibly] valuable stuff.

From what I understand, Israel won't use at least much of it due to Israel's policy of only using NATO-approved weapons. Destroying it seems to be wasteful, though if there is no other use for it that is what the IDF will continue to do.

MK Dan Ilouz (Likud) has proposed a law by which any of these captured Russian-supplied weapons and equipment that the IDF will not use should be transferred to Ukraine to use in its battle against Russia.

So, the IDF gets first dibs to put whatever it feels it can use into use in its own military efforts.

After the IDF decides it has taken what it will and has no use for the rest, the Defense Ministry should find a way to securely send the rest to Ukraine to use in its war against Russia.

Interestingly, Ilouz writes in the text of the proposal a couple of interesting points.

First, Ilouz explains that this is in order to maintain security stability in the region and internationally and "to assist countries fighting for their sovereignty", Israel should transfer these weapons to Ukraine, etc...

I hope this text won't come back to be used against Israel, as other countries will defend their support for the Palestinians as a country fighting for its sovereignty which the Israeli Right supports while pointing to this law.

Second, Ilouz calls this poetic justice - supporting allies internationally against those who supply our terrorist enemies with weapons with those very weapons. And this would be a poetic justice.

This will probably upset Russia