An Israeli man who illegally traveled to Iran twice and spied on behalf of the Islamic Republic was sentenced to 10 years in prison for espionage on Tuesday.

Mordechai (Moti) Maman, 72, from the southern city of Ashkelon, plead guilty to charges including illicitly entering an enemy state and making contact with a foreign agent.

“The judge issued a sentence that reflects the gravity of cooperating with Iran. The message is clear: cooperating with Iran simply isn’t worth it,” the prosecutor’s office said in a media statement.