Prime Minister Benjamin Netanyahu said Israel was hitting its enemies and "continuing forward to victory" on Wednesday as the country braced for an expected attack by Iran and its proxies.
Israel was "determined to defend" itself following threats of retaliation after its killing of a top Hezbollah commander and following the death of Hamas's former chief Ismail Haniyeh.
"We are continuing forward to victory," the premier told new recruits at the Tel Hashomer military induction in Tel Aviv, AFP reported.
"I know that the citizens of Israel are concerned, and I ask one thing of you: be patient and level-headed.
"We are prepared both defensively and offensively. We are striking our enemies and are determined to defend ourselves."
Israel claimed the killing of Hezbollah military commander Fuad Shukr in Beirut last week. It has not commented on the death of Haniyeh in Tehran.
However, both Iran and Hamas blamed Israel for Haniyeh's assassination and, along with Iran-linked Lebanese group Hezbollah, threatened reprisals.
Separately, Israeli government spokesman David Mencer told reporters, "This country is able to defend itself, and of course, both in ways which our enemies have seen, but also in ways they have not seen."
He added: "We know how to deal with this Iranian menace... together with our allies, we are able to stand up to them."
