Quran 26:38 — The Poets (Al-Shu`ara')

فَجُمِعَ السَّحَرَةُ لِميقٰتِ يَومٍ مَعلومٍ

The magicians were gathered at the appointed time, on the appointed day.

[26:37] "Let them summon every experienced magician."

[26:39] The people were told: "Come one and all; let us gather together here.