"We continue striking Hamas while defending our citizens. It will take more time," he said while visiting an Iron Dome missile defense battery in central Israel.
Israeli troops massed at Gaza's border on Thursday and Palestinian militants pounded Israel with rockets in intense hostilities that have caused international concern and touched off clashes between Jews and Arabs in Israel.
At least 83 people have been killed in Gaza since violence escalated on Monday, medics said. Seven people have been killed in Israel, its military said.