Article 5 is the one that got invoked by the Hamas attack
As stated in another thread, at this point Biden has done enough to cover against any legal retaliation however, and 100% command a withdrawal of US support as Israel has actually been using the supplies to commit war crimes
That's only a subsection of our obligations. Two paragraphs up are what I was actually talking about. We have multiple bilateral defense agreements with them which essentially boils down to an attack on me must me treated as an attack on you.
The ways to remedy a bilateral defense agreement depending on the actual agreement (I'm having trouble finding any of the us-isreal ones... So I'm just making assumptions here) usually boil down to supplying military aid or providing military defense.
Essentially the us must deploy supplies or a defense force. I'll keep digging for the actual text of one of these treaties but it might take a bit because the US state departments site is actually just really badly organized.