ALEPPO – Abu Bakr al-Baghdadi, the supreme leader of the Islamic State (ISIS) extremist group, said in an audio message released on Saturday that airstrikes by the U.S.-led coalition and Russia have failed to weaken his group.

Al-Baghdadi said that his self-declared Caliphate is “doing well”, promising his followers with victory over their enemies.

“Be confident that God will grant victory to those who worship him, and hear the good news that our state is doing well,” the ISIS alleged Caliph said in an audio message released online by pro-ISIS media outlets.

“The more intense the war against it, the purer it becomes and the tougher it gets,” he said.

Al-Baghdadi also mocked the recently announced Saudi-led Islamic alliance against “terrorism”, considering the member states of the alliance as enemies of Islam.

ISIS leader also warned Israel saying: “We are getting closer to you every day.”

Threatening Israeli Jews, al-Baghdadi said:”You will hide behind trees and stones from the fighters of our state.”