This is merely a bullet point on the main article, but seems more-significant to me than the article’s main title, and has now been cited on a number of other news sites:
Iranian source tells Al Jazeera Iran sent a message to the US via Qatar saying that it does not seek regional war but adding that “the phase of unilateral self-restraint has ended”. It also warned any Israeli attack would be met with an “unconventional response” that includes targeting Israeli infrastructure.
I don’t know if it is that off-base to be honest, restraint does not mean that they practiced pacifism, just that the response was disproportionately small.