Surah Ash-Shams 91:12

إِذِ ٱنۢبَعَثَ أَشْقَىٰهَا

When the most wretched of them was sent forth.

Translation: Saheeh International

Tafsir

when the most wretched of them whose name was Qudār was dispatched when he hastened in order to hamstring the she-camel with their approval.

Excerpt from Tafsir al-Jalalayn, commentary on 91:12, via Quran.com. The reader has the full commentary and 9 more tafsirs.