Zechariah 4:7 → Isaiah 40:4

Zechariah 4:7 addresses a "great mountain" that will "become a plain" (לְמִישֹׁר, lemishor) before Zerubbabel, echoing Isaiah 40:4's new exodus vision of "every mountain and hill made low" and "the rugged land a plain" (לְמִישׁוֹר, lemishor). Both texts use the root ישׁר (yashar, "level/straight") to describe obstacles being flattened by divine power. Isaiah's leveling serves the preparation of a highway for God's return to Zion; Zechariah's leveling serves Zerubbabel's completion of the second temple. Zechariah applies Isaiah's cosmic new-exodus imagery to a concrete historical challenge — the obstacles facing temple reconstruction — thereby interpreting the rebuilding project as a partial fulfillment of Isaiah's promised restoration. These obstacles were concrete and historical — Persian bureaucratic resistance, Samaritan opposition, and the community's own discouragement — all of which Zechariah pictures being flattened before Zerubbabel as he brings forth the capstone.