The Quran

إِنَّ الَّذينَ يُجادِلونَ في آياتِ اللَّهِ بِغَيرِ سُلطانٍ أَتاهُم ۙ إِن في صُدورِهِم إِلّا كِبرٌ ما هُم بِبالِغيهِ ۚ فَاستَعِذ بِاللَّهِ ۖ إِنَّهُ هُوَ السَّميعُ البَصيرُ

Ali Unal

Those who dispute concerning the signs and Revelations of God without any authority that has reached them,¹ (do so because) in their bosoms is a craving for superiority, which they will not attain. But take refuge in God (from their schemes). Surely He is the All-Hearing, the All-Seeing.

In several other verses, such as verse 35 of this sūrah, the Qur’ān draws attention to the fact that those who talk about God’s signs and Revelations must have a warrant or authority that has reached them. That is, God’s signs and Revelations are matters that concern Him and His Religion. So talking about God requires definite knowledge of Him, which can only be acquired through Revelation and the Messengers. Talking about God’s Religion requires expert knowledge about it, and its first and foremost source is, again, God and the Revelation. Therefore, those who dispute about God and His Religion without basing their information on sufficient, expert knowledge from the Qur’ān and God’s Messenger, upon him be peace and blessings, are included in the threats found in these verses.