Al-Mukhtasar
إِن نَّشَأْ نُنَزِّلْ عَلَيْهِم مِّنَ ٱلسَّمَآءِ ءَايَةً فَظَلَّتْ أَعْنَـٰقُهُمْ لَهَا خَـٰضِعِينَ ﴿٤﴾
If I had wished to send down to them a miracle from the sky I would have sent it down and their necks would remain bowed in utter humility before it. But I did not wish that, in order to test them: Do they believe in the Ghaib?