Muhammad is not mentioned in the Bible, which was written long
before the time of Muhammad and its authors could not have known of
him. However, leaders of Islam teach that the Bible foreshadows the
coming of Muhammad, just as Christian religious leaders teach that
the Old Testament foreshadows the coming of Jesus.
No, Muhammad is never mentioned in the Bible as the last books of
the New Testament were written roughly withing 100 years of Jesus.
Muhammad didn't found Islam until 610 AD. However Both Jesus and
the Virgin Mary, who is considered one of the holiest women of
Islam, are mentioned many times in the Koran. Islam teaches that
these two were incredibly good people but not divine. In fact,
according to Islam, many of the great people of the Christian Bible
(Abraham, Jesus, Mary, Ishmael to name a few) were actually Muslims
without knowing it, because they submitted to God.