The attribution of the Crucifixion to the Jews appears in several 2nd-century documents; Justin actually uses the words "He was pierced by the Jews" in his Dialogue with Trypho.
The text is first mentioned, critically, in the True Account of the anti-Christian writer Celsus (c. 178 CE), and therefore would have been contemporary with the surviving, and much more famous, Dialogue between the convert from paganism Justin Martyr and Trypho the Jew.
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