What does Psalm 48:7 mean?

This psalm uses Jerusalem as a real-world example of God's miraculous power and glory (Psalm 48:1–3). That includes mention of enemies being dramatically defeated (Psalm 48:4–6).

The reference to "ships of Tarshish" might be entirely symbolic. Every language has familiar metaphors for strength and power. The Bible often refers to the "cedars of Lebanon" in such a context (Psalm 29:5; 92:12; Isaiah 2:13). The imagery of fine ships (Isaiah 2:16) being wrecked by an even more powerful wind speaks to the overwhelming power of God against Israel's enemies. It's unlikely that ships would be used in any meaningful assault on Jerusalem since it is far from the shore.

Familiar symbolism also appears in references to the east wind. It was notorious for causing sudden destruction. Job 27:21 refers to the east wind as carrying away a wicked rich man. Jonah 4:8 mentions that God appointed a scorching east wind to beat down on Jonah's head. As a result, Jonah was faint. Ezekiel 27:25 portrays the ships of Tarshish as carrying cargo from many countries and cities. Addressing the ships, this verse says, "So you were filled and heavily laden in the heart of the seas." However, tragedy struck. "Your rowers have brought you out into the high seas. The east wind has wrecked you in the heart of the seas" (Ezekiel 27:26).

The exact location of Tarshish is unknown. Bible geographers have speculated it was in Spain, Tunisia, or Phoenicia.