The Meeting of the Two Parties, Musa's Propagation of the Message and the Magicians
Allah informs,
فَتَوَلَّى فِرْعَوْنُ فَجَمَعَ كَيْدَهُ ثُمَّ أَتَى
So Fir`awn withdrew, devised his plot and then came back.
Allah, the Exalted informs that when Fir`awn and Musa agreed to an appointed meeting at a specified place and time, Fir`awn began to gather some magicians from the cities of his kingdom. Every person who had any affiliation with magic at that time was summoned, and magic was very widespread and in demand at that time.
This is as Allah says,
وَقَالَ فِرْعَوْنُ ايْتُونِى بِكُلِّ سَـحِرٍ عَلِيمٍ
And Fir`awn said;"Bring me every well-versed sorcerer." (10;79)
Then, the day came. It was the day when all of the people gathered, which was well-known, being the day of the festival.
Fir`awn was there sitting upon his throne surrounded by the elite officials of his kingdom. The subjects were all standing on his right and his left.
Then, Musa came forward leaning upon his stick accompanied by his brother Harun.
The magicians were standing in front of Fir`awn in rows and he was prodding them, inciting them and encouraging them to do their best on this day.
They wanted to please him and he was promising them and inspiring them. They said,
فَلَمَّا جَأءَ السَّحَرَةُ قَالُواْ لِفِرْعَوْنَ أَإِنَّ لَنَا لاّجْراً إِن كُنَّا نَحْنُ الْغَـلِبِينَ
قَالَ نَعَمْ وَإِنَّكُمْ إِذاً لَّمِنَ الْمُقَرَّبِينَ
Will there surely be a reward for us if we are the winners! He (Fir`awn) said;"Yes, and you shall then verily be of those brought near (to myself)." (26;41-42