Michael F. Bird reports on how the Hebrew Bible and Septuagint casts the Messianic King's origins back "into a primordial history."
Michael F. Bird, Jesus Among the Gods: Early Christology in Greco-Roman World (Waco, TX.: Baylor University Press, 2022), 323-24
Casting the king’s origins back into a primordial history and among the stars of the heavens appears frequently in the literature. The Greek psalter presages the preexistence and heavenly origins of a messianic figure. In Psalm 72 (Heb)/71 (LXX) it is said in v. 17, “May his name endure forever, his fame continue as long as the sun” (Heb) and “Let his name be blessed forever. Before the sun his name will remain” (LXX). The Greek text provides an explicitly temporal sequence so that the king’s name exists “before” (pro) the sun. Added to that, in Ps 110 (Heb)/109 (LXX) v. 3, the ambiguity of the Hebrew (lit., from womb-dawn-dew-childhood) is translated into Greek as “from the womb, before the morning star, I begat you” with obvious influence from Ps 2.7 (begotten you) and perhaps from Isa 14.12 (morning star). Note too in Greek Micah that the coming Davidide’s “entrance has its beginning form the days of the ages” (Micah 5.1 LXX).