فَلَوۡ أَنَّ لَنَا كَرَّةً فَنَكُونَ مِنَ ٱلۡمُؤۡمِنِينَ
"'Now if we only had a chance of return we shall truly be of those who believe!'"<br/>
If only we had another turn, [another] return to this world, we would have been among those who believe!' (law, 'if only', here is for [the conditional] optative, to which nakoona, 'we would have been', constitutes the response).