وَلَا يَأْتُونَكَ بِمَثَلٍ إِلَّا جِئْنَـٰكَ بِٱلْحَقِّ وَأَحْسَنَ تَفْسِيرًا
Wa laa yaatoonaka bimasainn illaa ji'naaka bilhaqqi wa ahsana tafseeraa
They cannot put any argument to you without Our bringing you the truth and the best explanation.
They bring you no argument without our bringing you the truth and a finer explanation.