God's earthly sanctuary: in the DDS (Dead Sea Scrolls) 11Q'P XXIX ll. 7-10: God's temple had glory and a form of preexisting state before creation;
“I shall accept them and they shall be my people and I shall be for them forever. I will dwell with them for ever and ever and will sanctify my s[an]ctuary by my glory. I will cause my glory to rest on it until the day of creation on which I shall create my sanctuary, establish- ing it for myself for all time according to the covenant which I made with Jacob in Bethel.”
E.C. Derrick notes in Primitive Christian Eschatology, The Hulsean Prize Essay for 1908, Cambridge University Press,1912, pp. 253, 254.
“When the Jew said something was ‘predestined,’ he thought of it as already ‘existing’ in a higher sphere of life. The world’s history is thus predestined because it is already, in a sense, preexisting and consequently fixed. This typically Jewish conception of predestination may be distinguished from the Greek idea of preexistence by the predominance of the thought of ‘preexistence’ in the Divine purpose.”
Also the notion of an assumed preexisting messiah in the NT can also be tracked down in early pre-Christian Jewish literature. I.e J.R. Daniel Kirk mentions that 4 EZRA presents a human messiah as existing, yet created prior to coming to earth. He says; “ this Davidic and human Messiah [the son of man figure] seems to exist in heaven with God before coming to earth. This son is reserved where none can see him (13:52), but Ezra is about to go to live with him (14:9)”…(brackets mine). Excerpt from: "A Man Attested by God: The Human Jesus of the Synoptic Gospels" by J. R. Daniel Kirk. pg.246
This could be an early resource behind the ideal pre-existent glory God had with his anointed human messiah that will be returned after a future exaltation in John 17:5…