THE BEGINNING OF THE QURAN
Revelations were given to Muhammad (p.b.u.h.) from around 610 AD. until shortly before his death in 632 AD. They lasted about 23 years. ("'Ulum Al-Quran", by Ahmad von Denffer, 1985, pages 54-55)
THE BEGINNING OF THE INJIL
Jesus started his public ministry in about 26 AD. This is known because in Luke 3, verse 1 it is related to the "...fifteenth year of the reign of Tiberius Caesar..." Secular history verifies that Tiberius had authority in the provinces concerned beginning in 11 AD. (N.I.V. Study Bible, 1985, p.1540. The mentioning of three annual Jewish passover feasts (John 2, 6, 12) leads to the conclusion that he preached and taught for about three years until 29 AD.
