Quran 26:31 — The Poets (Al-Shu`ara')

قالَ فَأتِ بِهِ إِن كُنتَ مِنَ الصّٰدِقينَ

He said, "Then produce it, if you are truthful."

[26:30] He said, "What if I show you something profound?"

[26:32] He then threw his staff, whereupon it became a profound snake.