Surah Al-A'raf 7:151

قَالَ رَبِّ ٱغْفِرْ لِى وَلِأَخِى وَأَدْخِلْنَا فِى رَحْمَتِكَ ۖ وَأَنتَ أَرْحَمُ ٱلرَّٰحِمِينَ

[Moses] said, "My Lord, forgive me and my brother and admit us into Your mercy, for You are the most merciful of the merciful."

Translation: Saheeh International

Tafsir

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’.

Excerpt from Tafsir al-Jalalayn, commentary on 7:151, via Quran.com. The reader has the full commentary and 9 more tafsirs.