I do believe you meant, where does it affirm the seventieth week ended at the first advent? The syntax affirms it.
In 9:23 Daniel is told to consider the vision to understand the matter.
At the beginning of thy supplications the commandment came forth, and I am come to shew thee; for thou art greatly beloved: therefore understand the matter, and consider the vision. (Daniel 9:23)
In the explanation of the matter that follows, the Hebrew word
neḥ·taḵ is translated as determined but more accurately means:
to divide. Daniel was instructed
to divide seventy weeks from the 2300 evening/mornings to give Daniel’s people and the holy city a final chance to finish the transgression, and to make an end of sins, etc., etc. Then Daniel is instructed to commence the count at the decree to restore the city, which scholars agree was the final decree in Ezra 6, some 49 years after Cyrus’s first decree.
Point is that Daniel’s people and the holy city were given a final chance of 490 years to take the gospel to the nations but they failed. If they had brought
in everlasting righteousness, for example, they would have sent salvation to the nations, but they failed. This we see affirmed in Acts with the stoning of Stephan that, once again, scholars can place at AD 34, fulfilling the final week of the prophecy. After the stoning of Stephen, the disciples scattered and salvation went to the gentiles and the work in Jerusalem ultimately came to an end.
For this Agar is mount Sinai in Arabia, and answereth to Jerusalem which now is, and is in bondage with her children. (Galatian 4:25)
Such an interpretation has overwhelming support in the scriptures as opposed to the futurist gap theory. There is certainly nothing within the context of Daniel 9:25-27 that even remotely conveys Christ's return or any notion of the antichrist. The abominations and desolations in the final verse are ascribed to the defilement of the sanctuary by the Romans that followed on the heal of the final week. Desolations would continue until the time of the Gentiles be fulfilled (Luke 21:20-24; Romans 11:25).