ثُمَّ قُلْتَ: ( فَوَرَبِّ السَّمَاءِ وَالأَرْضِ إنَّهُ لَحَقٌّ مِثْلَ مَا أَنَّكُمْ تَنْطِقُوْنَ ).
thumma qult: (fawarabbi alssama'i wal-ardi innahu lahaqqun mithla ma annakum tantiquun)
And then Thou hast said, "So by the Lord of heaven and earth, it is as surely true as that you have speech" (51:23)!