Surah Ash-Shu'ara, verse 30

قَالَ رَبُّ ٱلْمَشْرِقِ وَٱلْمَغْرِبِ وَمَا بَيْنَهُمَآ ۖ إِن كُنتُمْ تَعْقِلُونَ ﴿٢٨﴾

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

قَالَ لَئِنِ ٱتَّخَذْتَ إِلَـٰهًا غَيْرِى لَأَجْعَلَنَّكَ مِنَ ٱلْمَسْجُونِينَ ﴿٢٩﴾

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

قَالَ فَأْتِ بِهِۦٓ إِن كُنتَ مِنَ ٱلصَّـٰدِقِينَ ﴿٣١﴾

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

فَأَلْقَىٰ عَصَاهُ فَإِذَا هِىَ ثُعْبَانٌۭ مُّبِينٌۭ ﴿٣٢﴾

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