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Libri Sibyllini
the Sibylline Books
also: Sibyl, Sibylla, Sibyllae, Sibylline Books, Sibylline oracle, the Sibylline Books
The collection of oracular verses kept by the quindecimviri at Rome and consulted in crises. In 56 BC a verse forbidding the senate to restore an Egyptian king 'with a multitude' (i.e. an army) was produced to block an armed restoration of Ptolemy Auletes, the 'religious scruple' Cicero reports.