﴿ وَلَقَدْ ءَاتَيْنَا مُوسَىٰ تِسْعَ ءَايَٰتٍۭ بَيِّنَٰتٍۢ ۖ فَسْـَٔلْ بَنِىٓ إِسْرَٰٓءِيلَ إِذْ جَآءَهُمْ فَقَالَ لَهُۥ فِرْعَوْنُ إِنِّى لَأَظُنُّكَ يَٰمُوسَىٰ مَسْحُورًۭا ﴾

“AND, INDEED, We gave unto Moses nine clear messages. Ask, then, the children of Israel [to tell thee what happened] when he came unto them, [and appealed to Pharaoh,] and Pharaoh said unto him, "Verily, O Moses, I think that thou art full of sorcery!"”

Please check ayah 17:104 for complete tafsir.