Jews and Christians do not need Muhammad because they have the Torah and the Gospel, which are valid sources of guidance.

The Quran, in verses such as Q. 5:43-48, recognizes the Torah and the Gospel as valid sources of moral and legal judgment for Jews and Christians. However, it is essential to understand that the Quran also claims to confirm these scriptures, indicating that they are part of a larger narrative that culminates in the revelation of the Quran itself. The New Testament presents Jesus as the fulfillment of the Law and the Prophets, which means that while the Torah and Gospel are acknowledged, they are not the final word on God's revelation. Jesus' teachings and the New Testament writings provide a new covenant that surpasses the old, offering a more complete understanding of God's will. Therefore, Christians believe that the guidance they receive from the Bible, particularly the New Testament, is essential and authoritative, even in light of the Quran's claims about previous scriptures.