Isaiah 42 refers to Muhammad as the servant of God, and thus he is a true prophet.

In Isaiah 9:6-7, the prophecy speaks of a child born who is called the Mighty God and the Everlasting Father, indicating that this figure is divine. Isaiah further emphasizes that there is no other God besides Yahweh, as seen in Isaiah 43:10 and 45:21-22, which affirms the uniqueness of God and His nature. The Quran explicitly denies the possibility of Allah being begotten, as stated in Surah 112:3, which contradicts the interpretation of Isaiah 42 as referring to Muhammad. Additionally, Isaiah describes the exaltation of the servant in a manner that parallels the exaltation of Yahweh, suggesting that the servant is indeed divine and not a mere human prophet like Muhammad.