In the book of the records of thy fathers That is, thy predecessors, the former emperors of this empire; namely, in the Assyrian and Babylonish records; which, together with the empire, were now in the hands of the Persian kings.
Related Commentaries of Ezra 4:15
Ezra 4:15
15 That search may be made in the book of the records of thy fathers: so shalt thou find in the book of the records, and know that this city is a rebellious city, and hurtful unto kings and provinces, and that they have movedi sedition within the same of old time: for which cause was this city destroyed.