American-born jihadi Adam Gadahn, in a 2010 v
American-born jihadi Adam Gadahn, in a 2010 vReuters

While Islamic State was once associated with Al Qaeda, the atrocities it has committed have now banned its members from paradise, a prominent Al Qaeda terrorist warned in a publication released Monday. 

“While no one can deny the considerable strength and prowess of the Islamic State group [ISIS] in military terms, at the same time, the crimes it has committed against Muslims cannot simply be overlooked or forgotten with time, because in Islam there is no statute of limitations,” Adam Gadahn, the American citizen also known as Al Qaeda leader Azzam the American, stated before his death in an Al Qaeda magazine, according to ABC News.

"If these wrongs are not brought to an end and rectified here in this world, then a severe punishment has been promised both for those who committed them as well as those who encouraged, condoned or justified them, even if from behind a computer or mobile phone thousands of miles away.”

“Oppression of any kind is wrong, and [there] will be darkness for its perpetrator on the Day of Judgment," he added. "The Ummah’s [Muslim community’s] Jihad is not a video game; it is real life, with real consequences, in this world and the next." 

Al Qaeda recently confirmed that Gadahn was killed in an American drone strike on one of the terror group's compounds in Pakistan. 

The group has also joined the fight against ISIS - despite the latter's origins - and clashed with an ISIS-associated group along the Israeli border in April.