Surah Taha 20:67
فَأَوْجَسَ فِى نَفْسِهِۦ خِيفَةً مُّوسَىٰ
And he sensed within himself apprehension, did Moses.
Translation: Saheeh International
Tafsir
And Moses sensed fear within himself that is to say he feared that if the effect of their sorcery was of the same kind as his miracle he would become suspect in people’s minds and they would not believe in him.
Excerpt from Tafsir al-Jalalayn, commentary on 20:67, via Quran.com. The reader has the full commentary and 9 more tafsirs.