Verse 20of 56

A Threat for Whoever claims that the Qur'an is MagicAllah threatens this wicked person whom He has favored with the blessings of this world, yet he is ungrateful for the blessings of Allah and he meets them with disbelief (in Allah) and rejection of His Ayat. He invents lies against Allah's Ayat and claims that they are the words of a man. Allah recounts to him His favors upon him when He says,ذَرْنِى وَمَنْ خَلَقْتُ وَحِيداً (Leave Me alone (to deal) with whom I created lonely.

Source: Tafsir Ibn Kathir — abridged excerpt