John Calvin on Isaiah 23:14

14. Howl, ye ships of Tarshish. He repeats what he formerly said; for the Cilicians, on account of their vicinity, constantly traded with the inhabitants of Tyre. He bids their ships howl, because, when that harbour is shut up, the merchants will be struck with amazement at not having their ordinary intercourse. He calls that harbour which they visited, their strength, not only because it was a place of resort that might be relied on, but because there was no other way in which their voyages could yield profit.