Charles Ellicott Commentary Lamentations 2:8

"Jehovah hath purposed to destroy the wall of the daughter of Zion; He hath stretched out the line, he hath not withdrawn his hand from destroying; And he hath made the rampart and wall to lament; they languish together." — Lamentations 2:8 (ASV)

He hath stretched out a line. — The phrase implies (See Notes on 2 Kings 21:13; Isaiah 34:11; Amos 7:7) the systematic thoroughness of the work of destruction.

He made the rampart. — Even the very stones of the walls of Zion are thought of as “crying out” and wailing over their own downfall. (Luke 19:40.)