Allah said,

﴿وَمَنْ أَظْلَمُ مِمَّنِ افْتَرَى عَلَى اللَّهِ كَذِباً﴾

(And who can be more unjust than he who invents a lie against Allah,) Therefore, none is more unjust than one who lies about Allah claiming that He has partners or a son, or falsely claiming that Allah sent him as a Prophet;

﴿أَوْ قَالَ أُوْحِى إِلَىَّ وَلَمْ يُوحَ إِلَيْهِ شَىْءٌ﴾

(or says: "I have received inspiration,'' whereas he is not inspired with anything;) `Ikrimah and Qatadah said that this Ayah was revealed about Musaylimah Al-Kadhdhab.

﴿وَمَن قَالَ سَأُنزِلُ مِثْلَ مَآ أَنَزلَ اللَّهُ﴾

(and who says, "I will reveal the like of what Allah has revealed.'') This refers to he, who claims that the lies he invents rival the revelation that came from Allah. In another Ayah, Allah said,

﴿وَإِذَا تُتْلَى عَلَيْهِمْ ءَايَـتُنَا قَالُواْ قَدْ سَمِعْنَا لَوْ نَشَآءُ لَقُلْنَا مِثْلَ هَـذَآ﴾

(And when Our verses (of the Qur'an) are recited to them, they say: "We have heard this (the Qur'an); if we wish we can say the like of this.'')