Surah Al-Muddaththir 74:24

فَقَالَ إِنْ هَـٰذَآ إِلَّا سِحْرٌ يُؤْثَرُ

And said, "This is not but magic imitated [from others].

Translation: Saheeh International

Tafsir

and said of what he the Prophet had brought ‘This is nothing but handed-down sorcery learnt from sorcerers;

Excerpt from Tafsir al-Jalalayn, commentary on 74:24, via Quran.com. The reader has the full commentary and 9 more tafsirs.