Wala'in sa altahum layaqoolunna innamaa kunnaa nakhoodu wa nal'ab; qul abillaahi wa 'Aayaatihee wa Rasoolihee kuntum tastahzi'oon
Should you question them what they were talking about, they would certainly say: "We were merely jesting and being playful." Tell them: "Was it Allah and His revelation and His Messenger that you were mocking?"