Two Islamic State militants were confronted by an elderly Muslim woman who bravely told them that their terror mission would never be backed by God, according to an emerging viral video.

The incredible video, believed to have been shot in Syria, appears to show the unidentified woman approach the militants' car and describe them as "devils," UK MailOnline reported.

"I swear nothing you have done was in the way of God," she states while berating them for being members of the barbaric terrorist organization.

Initially, the two shocked ISIS men can be seen pleading with the woman to leave. When she continues to hang around their car window, they start attempting to justify their actions by telling her of their recent prayer sessions.

However, the woman, dressed in traditional Arabian clothing, chooses to ignore the men's attempts to justify ISIS' brutality, instead attacking their bloodthirsty savagery and accusing them of "killing each other like donkeys" and "making us go backwards."

A couple more minutes into the video, they ask her to explain what she means by questioning if "everything is good between us?"

"You don't want this slaughtering, nor do you want this murder," she says.

Throughout the video, the woman keeps urging the militants to "turn back to God," warning them that ISIS is cursed and that neither they nor Bashar al-Assad's Syrian regime will ever find victory.

But the men seem to start getting frustrated, resorting to mockery when she begins reciting verses from the Koran that warn against fighting and slaughter when it is possible to make peace.

"Do not slaughter anyone and nobody will slaughter you. It's all forbidden. I swear nothing you have done was in the way of God," she claims.

"God is watching what you are doing. 'Those who deny our verses and are arrogant towards them, the gates of heaven will not be opened for them, nor will they enter paradise," she adds, quoting the Koran.

However in a most unsatisfactory conclusion, the video abruptly ends, leaving viewers to guess the fate of the courageous elderly woman.

Meanwhile last week, a United Nations watchdog revealed that abducted children in Iraq are reportedly being sold at markets as sex slaves and being either killed, crucified or buried alive by the Islamic State militants.

Amidst all this atrocity, ISIS is also using mentally challenged boys as suicide bombers, Breitbart reported.

"We have had reports of children, especially children who are mentally challenged, who have been used as suicide bombers, most probably without them even understanding," committee expert Renate Winter told Reuters. "There was a video placed (online) that showed children at a very young age, approximately eight years of age and younger, to be trained already to become child soldiers."