Surah Sad 38:33

رُدُّوهَا عَلَىَّ ۖ فَطَفِقَ مَسْحًۢا بِٱلسُّوقِ وَٱلْأَعْنَاقِ

[He said], "Return them to me," and set about striking [their] legs and necks.

Translation: Saheeh International

Tafsir

Bring them back to me! that is the horses that were displayed; and they so brought them back. Then he set about slashing with his sword their legs al-sūq is the plural of sāq and necks in other words he slaughtered them and cut off their legs as an offering of atonement to God exalted be He for having been distracted …

Excerpt from Tafsir al-Jalalayn, commentary on 38:33, via Quran.com. The reader has the full commentary and 9 more tafsirs.