Blessed be the LORD: for he has showed me his marvelous kindness in a strong city.
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Augustine of Hippo
AD 430
22. "Blessed be the Lord; for He hath made His mercy marvellous, in the city of compassing" (ver. 21). Blessed be the Lord, for after the correction of the sharpest persecutions He hath made His mercy marvellous to all throughout the world, in the circuit of human society.
In a. Symmachus, "as in a city shut up "with fortifications. (Calmet)
As seems to be understood, though some explain this of Ceila, (Berthier) or of Siceleg, which had been given to David for a retreat. He here apologizes for having recourse to an infidel. (Calmet)