The Qur'an as a criterion (Furqan) between truth and falsehood

تَبَارَكَ ٱلَّذِى نَزَّلَ ٱلْفُرْقَانَ عَلَىٰ عَبْدِهِۦ لِيَكُونَ لِلْعَـٰلَمِينَ نَذِيرًا

Blessed is He who sent down the Criterion upon His Servant that he may be to the worlds a warner -