Book of Daniel
In Chapter 9 Daniel tells of 70 weeks that were about the future. Bible scholars believe that each week represents 7 years and so it refers to 490 years, (70 times 7 years).  Daniel says that after that time Messiah would be "cut off". Christians think this may refer to the time Jesus was killed. Understanding the detailed meaning of the 70 weeks prophesy has puzzled many Bible scholars and there are many opinions.