Ayyub Faleh al-Rubaie, known by his nom de guerre Abu Azrael (Arabic: ابو عزرائيل, literally "Father of Azrael"), also known as the "Angel of Death", is a commander of the Kataib al-Imam Ali, an Iraqi Shi'a militia group of the Popular Mobilization Forces that is fighting ISIS (Islamic State of Iraq and Syria) in Iraq. He has become a public icon of resisting ISIS in Iraq among Shia Iraqis with a large following on social media. His motto and catchphrase is "illa tahin" (إلا طحين), meaning "Grind you to dust", that is, he would pulverize ISIS militants until nothing remains of them but powder.