26:38
Ash-Shu'ara 38
Surah Ash-Shu'ara (الشعراء), verse 38 — reference 26:38. Arabic text with optional translation and free audio on Al-Qalam.
فَجُمِعَ ٱلسَّحَرَةُ لِمِيقَـٰتِ يَوْمٍ مَّعْلُومٍ
fajumiʿa l-saḥaratu limīqāti yawmin maʿlūmin
So the magicians were assembled for the appointment of a well-known day.