Why did Moses, peace be upon him, ask his Lord to appoint Aaron, from his family, as a minister for him, to strengthen his arm and share with him in his mission, justifying this by saying: {So that we may glorify You much and remember You much} [20:34], and he did not mention a reason related to the propagation of the message or Pharaoh, knowing that glorification and remembrance can be performed by a person alone?

Moses (peace be upon him) requested that Aaron be a minister to him to assist him in his call, due to his fear of Pharaoh's denial, his constricted chest, and his lack of eloquence compared to his brother Aaron. And Allah answered his supplication. The reason for linking the request for prophethood for Aaron with his statement: "That we may glorify You much and remember You much" is because their joint presence in the call would increase glorification and remembrance, strengthen the argument, and reduce preoccupation with the necessities of life, thus enabling them to devote themselves to conveying the message.