Prophet Musa Discussion With Pharaoh.

In the Name Of Allah Most Gracious and Most Merciful

Fir'aun (Pharaoh) said: "And what is the Lord of the 'Alamin (mankind, jinns and all that exists)?"

Musa (Moses) said: "Lord of the heavens and the earth, and all that is between them, if you seek to be convinced with certainty."

Fir'aun (Pharaoh) said to those around: "Do you not hear (what he says)?"

Musa (Moses) said: "Your Lord and the Lord of your ancient fathers!"

Fir'aun (Pharaoh) said: "Verily, your Messenger who has been sent to you is a madman!"

Musa (Moses) said: "Lord of the east and the west, and all that is between them, if you did but understand!"

Fir'aun (Pharaoh) said: "If you choose an ilah (god) other than me, I will certainly put you among the prisoners."

Musa (Moses) said: "Even if I bring you something manifest (and convincing)?"

Fir'aun (Pharaoh) said: "Bring it forth then, if you are of the truthful!"

The Quran 26:23-31

Please Observe the Confidence,the Determination and the Concentration Prophet Moses having when Pharaoh said him mad
he continued  defending Allah he didn't Stop.