https://www.theguardian.com/world/2023/oct/12/israel-hamas-war-egypt-warned-foreign-affairs-gaza

It sounds like it was just a "routine warning"? That Israel needed to do something about the situation in Gaza cause something big might happen cause of the situation and not something specific like an attack will happen from this at least. Though with hindsight we can say that they should have paid more attention to it.