A.T. Robertson Commentary Hebrews 1:10

"And, Thou, Lord, in the beginning didst lay the foundation of the earth, And the heavens are the works of thy hands:" — Hebrews 1:10 (ASV)

Lord (Κυριε). In the LXX, not in the Hebrew. Quotation (the sixth) from Ps 102:26-28 through verses 10-12. Note emphatic position of συ here at the beginning as in verses 11-12 (συ δε). This Messianic Psalm pictures the Son in his Creative work and in his final triumph.

Hast laid the foundation (εθεμελιωσας). First aorist active of θεμελιοω, old verb from θεμελιος (foundation) for which see Col 1:23.