﴿ قَالَ ءَامَنتُمْ لَهُۥ قَبْلَ أَنْ ءَاذَنَ لَكُمْ ۖ إِنَّهُۥ لَكَبِيرُكُمُ ٱلَّذِى عَلَّمَكُمُ ٱلسِّحْرَ ۖ فَلَأُقَطِّعَنَّ أَيْدِيَكُمْ وَأَرْجُلَكُم مِّنْ خِلَٰفٍۢ وَلَأُصَلِّبَنَّكُمْ فِى جُذُوعِ ٱلنَّخْلِ وَلَتَعْلَمُنَّ أَيُّنَآ أَشَدُّ عَذَابًۭا وَأَبْقَىٰ ﴾

“Said [Pharaoh]: "Have you come to believe in him ere I have given you permission? Verily, he must be your master who has taught you magic! But I shall most certainly cut off your hands and feet in great numbers, because of [your] perverseness, and I shall most certainly crucify you in great numbers on trunks of palm-trees: and [I shall do this] so that you might come to know for certain as to which of us [two] can inflict a more severe chastisement, and [which] is the more abiding!"”

Please check ayah 20:73 for complete tafsir.