John Trapp on Isaiah 7:8

Ver. 8. For the head of Syria is Damaſcus] Not Jeruſalem, as they haply had contrived it: looking upon Jeruſalem as a City fatally founded to bear Rule, as One ſaith of Conſtantinople.

And the head of Damaſcus is Rezin] Let him ſet his heart at reſt, and not reach after the Dominion of Judah: leſt falling from his high hopes, he loſe that he hath already, and cry out with that Ambitioniſt, Sic mea fata ſequor.

And within threeſcore and five years] ſc. from the time that Amos foretold it, Chap. 5.27. & 7.8. that is, from the twenty fourth year of Ʋzziah to the ſixth of Hezekiah, when as the ten Tribes were carried away by Salmaneſer, 2 King. 17. Thus Hierom out of Seder-Olam. But I like better Piſcators computation, which is thus within 65. years, that is, from the fourth year of Ahaz now current to the 23. of Manaſſeh, when Ephraim ceaſed indeed to be a people by the command of Eſarhaddon Son of Senacherib: whereof ſee Ezra 4.2.