﴿ وَمَنْ أَظْلَمُ مِمَّنِ ٱفْتَرَىٰ عَلَى ٱللَّهِ ٱلْكَذِبَ وَهُوَ يُدْعَىٰٓ إِلَى ٱلْإِسْلَٰمِ ۚ وَٱللَّهُ لَا يَهْدِى ٱلْقَوْمَ ٱلظَّٰلِمِينَ ﴾

“And who could be more wicked than one who invents [such] a lie about [a message from] God, seeing that he is [but] being called to self-surrender unto Him? But God does not bestow His guidance upon evil-doing folk.”

(And who doth greater wrong) in his state of disbelief (than he who inventeth a lie against Allah) by ascribing to Him sons and partners (when he is summoned unto al-Islam) when he is summoned to believe in Allah's divine Oneness. The reference here is to the Jews whom the Prophet (pbuh) invited to embrace the profession of Allah's divine Oneness. (And Allah guideth not wrong-doing folk) He guides not to His religion those Jews whom He knew in His preeternal knowledge that they will die as Jews.