Postremo nemo aegrotus quidquam somniat tam infandum, guod non aliquis dicat philosophus.
-- Varro, Fragmenta
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"If it's well said, I said it."
Quidquid bene dictum est ab ullo meum est.
-- Seneca the Younger, Epistulae Morales, XVI, 7
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"Plague take those who said our wise words before we did."
Pereant qui ante nos nostra dixerunt.
-- St. Jerome, In Ecclesiasten Commentarius, I
All of the above are from Latin Quips at your Fingertips, by Rose Williams.