From the standpoint of Islam, there can be no doubt that Abraham, Isaac, Jacob, Joseph, Moses, David, Solomon were all prophets whom God had sent forth with a divine message There can be no doubt that that message was always one and the same in its essential content which consisted, above all, of the recognition of God, of His unity and transcendence, of the Day of Judgment, of the purposiveness of history, and of man’s responsibility to manage space-time as God has directed. That the prescriptive laws God had revealed to these prophets differed somewhat from the earlier revelations made to previous prophets, is granted; but it is understood as belonging to the “how” of obedience and fulfillment rather than to the essence. Equally, there can be no doubt that the Torah is God’s revelation to Moses, that it had definitively summed up and crystallized the earlier revelations. To doubt these facts is kufr, or unbelief.