After discussing the destruction due to come upon the city of Jerusalem, Jesus made the statement: “And Jerusalem will be trampled on by the nations, until the appointed times of the nations [“times of the Gentiles,” KJ, RS] are fulfilled.” (Lu 21:24)
... Thus, the well-known Commentary by F. C. Cook says of Luke 21:24: “It serves to separate the strictly eschatological portion [that is, the portion relating to the last days] of the great prophecy, from the part belonging properly to the destruction of Jerusalem.”