Surah Yusuf 12:77

۞ قَالُوٓا۟ إِن يَسْرِقْ فَقَدْ سَرَقَ أَخٌ لَّهُۥ مِن قَبْلُ ۚ فَأَسَرَّهَا يُوسُفُ فِى نَفْسِهِۦ وَلَمْ يُبْدِهَا لَهُمْ ۚ قَالَ أَنتُمْ شَرٌّ مَّكَانًا ۖ وَٱللَّهُ أَعْلَمُ بِمَا تَصِفُونَ

They said, "If he steals - a brother of his has stolen before." But Joseph kept it within himself and did not reveal it to them. He said, "You are worse in position, and Allāh is most knowing of what you describe."

Translation: Saheeh International

Tafsir

They said ‘If he is stealing a brother of his stole before’ that is Joseph — he had stolen a golden idol from his maternal grandfather and smashed it lest he worship it. …

Excerpt from Tafsir al-Jalalayn, commentary on 12:77, via Quran.com. The reader has the full commentary and 9 more tafsirs.