Surah Taha 20:66

قَالَ بَلْ أَلْقُوا۟ ۖ فَإِذَا حِبَالُهُمْ وَعِصِيُّهُمْ يُخَيَّلُ إِلَيْهِ مِن سِحْرِهِمْ أَنَّهَا تَسْعَىٰ

He said, "Rather, you throw." And suddenly their ropes and staffs seemed to him from their magic that they were moving [like snakes].

Translation: Saheeh International

Tafsir

He said ‘Nay you cast!’ and so they cast and lo! their ropes and their staffs ‘isiyyihim derives from ‘isūwwun but the two wāw letters have been changed into two yā’ letters with the kasra vowelling applied to both the ‘ayn and the sād appeared to him by the effect of their sorcery as though they were snakes gliding …

Excerpt from Tafsir al-Jalalayn, commentary on 20:66, via Quran.com. The reader has the full commentary and 9 more tafsirs.