Shared ground
These verses picture a coordinated threat against God’s city: multiple kings gather and advance “together,” but the moment they see “it,” confidence collapses into shock, panic, and retreat. The text’s main point is not the kings’ strategy but the speed and totality of their undoing.
The fear is described as something that “takes hold” of them on the spot—like sudden birth-pains. This is poetic language for overwhelming, uncontrollable terror rather than measured caution. The final line shifts to a direct address to God: God can break the biggest, most impressive ships with an east wind. The image reinforces the same claim: what seems strongest can be shattered quickly.
Where interpretation differs
One question is what “they saw” (v. 5) refers to. Some read it as the city itself—its strength, security, and visible stability. Others think the wording implies they perceived God’s protective presence or a divine act that made their plans fail.
Another question is how to take the “ships of Tarshish” and “east wind” (v. 7). Some treat this as a purely illustrative comparison from seafaring life, not tied to the kings in vv. 4–6. Others think it echoes an actual event (a storm or a historical defeat) and therefore carries more concrete historical weight.
Why the disagreement exists
The poem is compressed: it narrates a coalition, then a reaction, but does not name the city explicitly in v. 5, nor does it describe a battle or miracle in detail. Also, v. 7 introduces a sea image after a land scene, and the text does not explain whether this is a general comparison or a hint at a specific remembered deliverance.
What this passage clearly contributes
Explicitly, it portrays God as the decisive reason hostile rulers fail: their coalition unravels immediately upon “seeing,” and God is credited with the power to break what humans consider formidable (like major trading ships). By inference, the poem supports the wider claim of Psalm 48 that Zion’s security is grounded in God’s presence and power, not merely in political alliances or physical defenses. See also Psalm 46:6.