Surah Yusuf 12:84

وَتَوَلَّىٰ عَنْهُمْ وَقَالَ يَـٰٓأَسَفَىٰ عَلَىٰ يُوسُفَ وَٱبْيَضَّتْ عَيْنَاهُ مِنَ ٱلْحُزْنِ فَهُوَ كَظِيمٌ

And he turned away from them and said, "Oh, my sorrow over Joseph," and his eyes became white from grief, for he was [of that] a suppressor.

Translation: Saheeh International

Tafsir

And he turned away from them no longer addressing them and said ‘Alas my grief for Joseph!’ yā asafā the final alif of asafā has taken the place of the possessive yā’ of genitive annexation sc. yā asafī in other words it means yā huznī ‘O my sorrow’. …

Excerpt from Tafsir al-Jalalayn, commentary on 12:84, via Quran.com. The reader has the full commentary and 9 more tafsirs.