And when the decree was: 'Go to him and say: Indeed, we are the messengers of your Lord' - until the end of what they were commanded, and their saying included that their sender has complete power and comprehensive knowledge. This led to his question about their specification. He began the report about his response by saying: ﴿He said﴾, meaning Pharaoh was defending himself against them with debate, not with force, so that he would not be attributed with foolishness and ignorance: ﴿So who﴾, meaning it resulted from your words that no one among the people of the earth dares to confront me with this, to ask you: Who is ﴿your Lord﴾ who sent you, and he did not say: My Lord, diverting from equality of consideration and directing the speech towards the aspect that clarifies his disgrace.

And when Moses, peace be upon him, was the origin in that, and perhaps Pharaoh was greedy with his cunning and evil way for a stutter that might occur in his tongue, he singled him out by saying: ﴿O Moses﴾.