Al-A'raaf • EN-AL-JALALAYN
﴿ قَالَ رَبِّ ٱغْفِرْ لِى وَلِأَخِى وَأَدْخِلْنَا فِى رَحْمَتِكَ ۖ وَأَنتَ أَرْحَمُ ٱلرَّٰحِمِينَ ﴾
“Said [Moses]: "O my Sustainer! Grant Thou forgiveness unto me and my brother, and admit us unto Thy grace: for Thou art the most merciful of the merciful!"”
He said ‘My Lord forgive me what I have done to my brother and my brother he includes him in the supplication in order to reconcile him and to fend off any gloating over his misfortune and admit us into Your mercy for You are the Most Merciful of the merciful’.