Quran 9:65 from Surah At-Tawba on Divine Marvels.
وَلَئِن سَأَلۡتَهُمۡ لَيَقُولُنَّ إِنَّمَا كُنَّا نَخُوضُ وَنَلۡعَبُۚ قُلۡ أَبِٱللَّهِ وَءَايَٰتِهِۦ وَرَسُولِهِۦ كُنتُمۡ تَسۡتَهۡزِءُونَ
English translation: And if you ask them surely they will say Only we were conversing and playing Say Is it Allah and His Verses and His Messenger (that) you were mocking
Transliteration: wala-in sa-altahum layaqulunna innama kunna nakhudu wanal'abu qul abil-lahi waayatihi warasulihi kuntum tastahziuna