وَكَذَٰلِكَ أَنزَلْنَـٰهُ حُكْمًا عَرَبِيًّا ۚ وَلَئِنِ ٱتَّبَعْتَ أَهْوَآءَهُم بَعْدَ مَا جَآءَكَ مِنَ ٱلْعِلْمِ مَا لَكَ مِنَ ٱللَّهِ مِن وَلِىٍّ وَلَا وَاقٍ
wakadhālika anzalnāhu ḥuk'man ʿarabiyyan wala-ini ittabaʿta ahwāahum baʿdamā jāaka mina l-ʿil'mi mā laka mina l-lahi min waliyyin walā wāqin
So We have sent down the Quran to give judgement in the Arabic language. If you were to follow their desires, after the knowledge that has come to you, you would have no one to guard you or protect you from God.
And thus have We sent it (the Qur’ân) down to be a judgement of authority in Arabic. Were you (O Muhammad صلى الله عليه و سلم) to follow their (vain) desires after the knowledge which has come to you, then you will not have any Walî (protector) or Wâq (defender) against Allâh.