He spoke in Damascus on Monday as he inaugurated a new site for Iranian consular services in the Syrian capital.
Iran is showing increased diploamtic posturing in the region following the killing of senior IRGC official Mohammad Reza Zahedi.
Iran's Islamic Revolutionary Guard Corps has said that seven Iranian military advisers died in the strike, including Mohammad Reza Zahedi, a senior commander in its Quds Force.
The coffins of two of the killed officers were displayed in the capital, Tehran, to religious mourning chants. Some of those present waved the Palestinian flag.
Little is written today about Sunni Islamist and jihadi organizations in the Middle East, as the contest between Shia Iran with its proxies and Israel is the central strategic process in the region.
Former IDF official Itzhak Brik criticized the government and military preparedness in the wake of the recent strike in Damascus, noting that the army will not be able to fight on multiple fronts.
Iranian commanders thought embassy safe from Israeli strikes • Tehran investigating possible intelligence leak - Iranian official
IDF Military Intelligence Directorate head: Israel is facing "complex days" ahead amid increasing threats of strikes by Iran.
Iran and Syria "intentionally supported and encouraged a proxy actor who specifically sought to inflict violence upon innocent civilians," Judge Royce Lamberth wrote.
The European Union on Wednesday condemned the strike - saying the inviolability of diplomatic and consular premises and personnel must be respected.