1 Enoch 38:2
1 The First Parable. When the congregation of the righteous shall appear, And sinners shall be judged for their sins, And shall be driven from the face of the earth: 2 And when the Righteous One shall appear before the eyes of the righteous, Whose elect works hang upon the Lord of Spirits, And light shall appear to the righteous and the elect who dwell on the earth, Where then will be the dwelling of the sinners, And where the resting-place of those who have denied the Lord of Spirits? It had been good for them if they had not been born. 3 When the secrets of the righteous shall be revealed and the sinners judged, And the godless driven from the presence of the righteous and elect,
Acts 7:52
51 “You stubborn people, with uncircumcised hearts and ears! You are always resisting the Holy Spirit, like your ancestors did! 52 Which of the prophets did your ancestors not persecute? They killed those who foretold long ago the coming of the Righteous One, whose betrayers and murderers you have now become! 53 You received the law by decrees given by angels, but you did not obey it.” 54 When they heard these things, they became furious and ground their teeth at him.
Notes and References
"... There are other terms applied to Jesus in Acts that similarly reflect the author’s effort to convey what are likely authentic features of early Jewish-Christian discourse. Among these terms is “the righteous/just one” (ho dikaios), by which Jesus is designated in 7:52 and 22:14, and also in 3:14 in the slightly fuller expression “the holy and righteous one”. The use of the term with the definite article suggests that in these instances it is to be taken as a title and not simply an adjective. We probably have the term used also in 1 Enoch 38:2 (and also “the Righteous and Elect One” in 53:6) designating the messianic figure of the “Similitudes” in this composite book. This may mean that “the Righteous One” was, to some degree, in circulation in ancient Jewish messianic expectations, and so Jewish believers applied it to Jesus ..."
Hurtado, Larry W. Christology in Acts (pp. 217-237) Gorgias Press, 2012