Ash-Shu'ara 26:30

قَالَ إِنَّ رَسُولَكُمُ الَّذِي أُرْسِلَ إِلَيْكُمْ لَمَجْنُونٌ

[Pharaoh] said, "Indeed, your 'messenger' who has been sent to you is mad."

قَالَ رَبُّ الْمَشْرِقِ وَالْمَغْرِبِ وَمَا بَيْنَهُمَا ۖ إِن كُنتُمْ تَعْقِلُونَ

[Moses] said, "Lord of the east and the west and that between them, if you were to reason."

قَالَ لَئِنِ اتَّخَذْتَ إِلَـٰهًا غَيْرِي لَأَجْعَلَنَّكَ مِنَ الْمَسْجُونِينَ

[Pharaoh] said, "If you take a god other than me, I will surely place you among those imprisoned."

قَالَ فَأْتِ بِهِ إِن كُنتَ مِنَ الصَّادِقِينَ

[Pharaoh] said, "Then bring it, if you should be of the truthful."

فَأَلْقَىٰ عَصَاهُ فَإِذَا هِيَ ثُعْبَانٌ مُّبِينٌ

So [Moses] threw his staff, and suddenly it was a serpent manifest.

وَنَزَعَ يَدَهُ فَإِذَا هِيَ بَيْضَاءُ لِلنَّاظِرِينَ

And he drew out his hand; thereupon it was white for the observers.