Apostles
Later in the Gospel narratives the twelve apostles are described as having been commissioned to preach the Gospel to "all the nations", regardless of whether Jew or Gentile. Paul emphasized the important role of the apostles in the church of God when he said that the household of God is "built upon the foundation of apostles and prophets, Christ Jesus himself being the cornerstone".
Although not one of the apostles commissioned during the life of Jesus, Paul, a Jew named Saul of Tarsus, claimed a special commission from the risen Jesus and is considered "the apostle of the Gentiles", for his missions to spread the gospel message after his conversion. In his writings, the epistles to Christian churches throughout the Levant, Paul did not restrict the term "apostle" to the Twelve, and often refers to his mentor Barnabas as an apostle. The restricted usage appears in the Revelation to John.
Judaism's views on Muhammad
Natan'el al-Fayyumi, a prominent 12th-century Yemenite rabbi and theologian, and the founder of what is sometimes called "Jewish Ismailism", wrote in his philosophical treatise "Bustan al-Uqul" ("Garden of Wisdom") that God sends prophets to establish religions for other nations, which do not have to conform to the precepts of the Jewish Torah. Nethanel explicitly considered Muhammad a true prophet, who was sent from Heaven with a particular message that applies to the Arabs, but not to the Jews. However, Al-Fayymi's explicit acceptance of Muhammad's prophecy was rare and virtually unknown until recent times beyond his native Yemen.