رَبَّنَا ٱفۡتَحۡ بَيۡنَنَا وَبَيۡنَ قَوۡمِنَا بِٱلۡحَقِّ وَأَنتَ خَيۡرُ ٱلۡفَٰتِحِينَ.
Our Lord, decide between us and our people in truth, and You are the best of those who give decision.
Rabbana ftah baynana wabayna qawmina bilhaqqi waanta khayru lfatihin
After having advised his people and shown them right from wrong, Prophet Shu’aib saw that they would not accept the truth and that, in fact, they only became more hostile and stubborn. Hence, he invoked Allah to judge between those who upheld the truth from those who rejected it by descending His punishment upon the evildoers.