Surah Ash-Shu'ara, ayah 38

26:38

فَجُمِعَ ٱلسَّحَرَةُ لِمِيقَٰتِ يَوۡمٖ مَّعۡلُومٖ ٣٨

Fajumi'as-saharatu limīqāti yawmim ma'lūm

So the magicians were assembled for the appointment of a well-known day.1049

Footnotes

1049 i.e., the morning of the day of festival. See 20:58-59.