Against Apion Book 1.8: «For we have not an innumerable multitude of books among us, disagreeing from and contradicting one another, [as the Greeks have,] but only twenty-two books, which contain the records of all the past times; which are justly believed to be divine; and of them five belong to Moses, which contain his laws and the traditions of the origin of mankind till his death. This interval of time was little short of three thousand years; but as to the time from the death of Moses till the reign of Artaxerxes king of Persia, who reigned after Xerxes, the prophets, who were after Moses, wrote down what was done in their times in thirteen books. The remaining four books contain hymns to God, and precepts for the conduct of human life».
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«Jewish Encyclopedia: Bible Canon». ««Sirach… knew the Law and Prophets in their present form and sequence; for he glorifies (ch. xliv.–xlix.) the great men of antiquity in the order in which they successively follow in Holy Writ. He not only knew the name [Hebrew omitted] ("The Twelve Prophets"), but cites Malachi iii. 23, and is acquainted with by far the greatest part of the Hagiographa, as is certain from the Hebrew original of his writings recently discovered. He knew the Psalms, which he ascribes to David (Ecclus. [Sirach] xlvii. 8, 9), and the Proverbs: "There were those who found out musical harmonies, and set forth proverbs [A. V., "poetical compositions"] in writing" (xliv. 5). An allusion to Proverbs and probably to the Song of Solomon is contained in his words on King Solomon: "The countries marveled at thee for thy songs, and proverbs, and parables [or "dark sayings"], and interpretations" (xlvii. 17); the last three words being taken from Prov. i. 6, while the Song of Solomon is alluded to in "songs." He would have had no authority to speak of "songs" at all from I Kings v. 12; he must have known them. While he had no knowledge of Ecclesiastes, his didactic style proves that he used Job, as is also indicated by the words [Hebrew omitted] (xliv. 4, and afterward, [Hebrew omitted]). Ecclesiastes, Esther, and Daniel are not included in his canon (see Halévy, "Etude sur la Partie du Texte Hébreux de l'Ecclésiastique," pp. 67 et seq., Paris, 1897); he considers Chronicles and Ezra-Nehemiah as Holy Scripture (xlix. 12 = Ezra iii. 2; xlix. 13 = Neh. iii. and vi.; compare Neh. vi. 12); he mentions distinctly "the laws and prophets" (xxxix. 1); in the following sentences there are allusions to other writings; and verse 6 of the same chapter leads to the supposition that in his time only wisdom-writings and prayers were being written».»
Jewish Encyclopedia: Bible Canon: «It is true, Lucius ("Die Therapeuten," Strasburg, 1880) doubts the genuineness of this work; but Leopold Cohn, an authority on Philo ("Einleitung und Chronologie der Schriften Philo's," p. 37, Leipsic, 1899; "Philologus," vii., suppl. volume, p. 421), maintains that there is no reason to do so. Consequently, Siegfried's opinion ("Philo," p. 61, Jena, 1875) that Philo's canon was essentially the same as that of to-day, is probably correct (H. E. Ryle, "Philo and Holy Scripture," London, 1895)».
