Verse 23

قَالَا رَبَّنَا ظَلَمْنَآ أَنفُسَنَا وَإِن لَّمْ تَغْفِرْ لَنَا وَتَرْحَمْنَا لَنَكُونَنَّ مِنَ ٱلْخَـٰسِرِينَ

They said, our Lord, we have been unjust towards our own souls and if You do not forgive us and do not have mercy upon us, we will surely end up losers.