When, in the captivity of the people by Nebuchadnezzar, the Scriptures were corrupted, and after seventy years the Jews went up to their country, then in the times of Artaxerxes, king of the Persians, he inspired Ezra the priest, of the tribe of Levi, to set in order the words of all the former prophets, and to restore to the people the legislation by Moses. [Adversus Haereses, 3. 24. 1]
Moreover, in the captivity of Nebuchadnezzar, when the Scriptures had been destroyed in the time of Artaxerxes, king of the Persians, Ezra the Levite, the priest, having become inspired, recalled again, prophetically, all the ancient Scriptures. [Stramata 1.22]
After the destruction of Jerusalem by the Babylonian storming of it, every document of the Jewish literature is generally agreed to have been restored through Ezra. [On the Apparel of Women 1.3]
And this was nothing wonderful for God to do, who, in the captivity of the people under Nebuchadnezzar, when the Scriptures had been destroyed, and the Jews had returned to their own country after seventy years, afterwards, in the time of Artaxerxes, king of the Persians, inspired Ezra the priest, of the tribe of Levi, to relate all the words of the former prophets, and to restore to the people the legislation of Moses. [quoting Irenaeus, Church History 5.8.15]
Whether you choose to say that Moses was the author of the Pentateuch, or that Ezra was the restorer of the same work, I have no objections. [Adversus Helvidium]
Ezra, the priest of God, restored the law, which had been burned by the Chaldeans in the archives of the temple. For indeed he was full of the same spirit with which the Scriptures had previously been filled. [De Mirabilibus Sacrae Scripturae, 2.33]
[AD 202] Irenaeus on Ezra 6:7