Translation:

70. Those who reject the Book and the (revelations) with which We sent Our apostles: But soon shall they know

Notes (Tafseer)

4447. "The Book" may refer to the Holy Qur-an or to the fundamental, Revelation the "Mother of the Book" (xiii. 39), while the Books revealed to the messengers are the definite Revelations that came down to men from time to time.