IRENAEUS
“He who, when, during the captivity of the people under Nebuchadnezzar, the Scriptures had been corrupted, and when, after seventy years, the Jews had returned to their own land, then, in the times of Artaxerxes king of the Persians, inspired Esdras the priest, of the tribe of Levi, to recast all the words of the former prophets, and to re-establish with the people the Mosaic legislation. (Irenaeus Against Heresies, Book III, chapter 21, 2)
======
How long after seventy years did they return? Is this telling us what marked the end of the Seventy Years? In the immediate context of this passage, Irenaeus writes a most fanciful story regarding the translation of their Scriptures into Greek.