Scripture revealed before the coming of Muhammad cannot be found today in their full and original form. However, these scriptures do contain some fragments of the original teachings, although they are mixed up with later additions and interpretations. Some of these scriptures are: the Torah of the Jews, the Gospels of the Christians, the Vedas of the Hindus, and the Zend Avesta of the Zoroastrians.
On the other hand, the latest word of God that came to Muhammad is still intact and completely preserved in the Muslim scripture, which is the Quran.