Surah Ash-Shu'ara 26:49

قَالَ ءَامَنتُمْ لَهُۥ قَبْلَ أَنْ ءَاذَنَ لَكُمْ ۖ إِنَّهُۥ لَكَبِيرُكُمُ ٱلَّذِى عَلَّمَكُمُ ٱلسِّحْرَ فَلَسَوْفَ تَعْلَمُونَ ۚ لَأُقَطِّعَنَّ أَيْدِيَكُمْ وَأَرْجُلَكُم مِّنْ خِلَـٰفٍ وَلَأُصَلِّبَنَّكُمْ أَجْمَعِينَ

[Pharaoh] said, "You believed him [i.e., Moses] before I gave you permission. Indeed, he is your leader who has taught you magic, but you are going to know. I will surely cut off your hands and your feet on opposite sides, and I will surely crucify you all."

Translation: Saheeh International

Tafsir

Pharaoh said ‘Do you believe a-āmantum read pronouncing both hamzas or replacing the second one with an alif him Moses though I have not given you leave? He is indeed your chief the one who has taught you sorcery — so that he only taught you some tricks and then surpassed you with others. …

Excerpt from Tafsir al-Jalalayn, commentary on 26:49, via Quran.com. The reader has the full commentary and 9 more tafsirs.