Surah Al-Furqan, ayah 33

وَلَا يَأۡتُونَكَ بِمَثَلٍ إِلَّا جِئۡنَٰكَ بِٱلۡحَقِّ وَأَحۡسَنَ تَفۡسِيرًا ٣٣

Walā ya'tūnaka bimathalin illā ji'nāka bil-haqqi wa ahsana tafsīrā

And they do not come to you with an example [i.e., argument] except that We bring you the truth and the best explanation.