Charles Ellicott Commentary Nahum 3:18

"Thy shepherds slumber, O king of Assyria; thy nobles are at rest; thy people are scattered upon the mountains, and there is none to gather them." — Nahum 3:18 (ASV)

Shepherds — that is, chief officers, as in Micah 5:2 and throughout. Their sheep are “scattered upon the mountains and none attempts to gather them.” So Micaiah announces to Ahab, “I saw all Israel scattered upon the hills as sheep that have not a shepherd” (1 Kings 22:17).

Thy nobles shall dwell. — Better, thy mighty men are lying still.