"... The Hebrew of Ben Sira was not included in the Jewish biblical canon. Testimony to its survival, however, is found in the numerous quotations of the book in rabbinic literature. Of course, the medieval manuscripts discovered in the Cairo Genizah constitute prima facie evidence for its continued existence in Hebrew. The Greek translation seems to have been influential in early Christianity, and it eventually was included in the Christian Old Testament (only to be excised by Protestants in the sixteenth century). Sirach is not cited explicitly in the New Testament, and scholars differ as to how much influence it had on the New Testament writings. Those who see broad influence have argued for it primarily in Matthew, Luke, some of Paul’s letters and the Epistle of James (compare Harrington, Invitation, p. 90; Schürer, History, vol. III.1, pp. 205–208). In other early Christian literature, Didache 4:5 and Barnabas 19:9 bear a very close resemblance to, and perhaps are taken from, Sirach 4:31. If these texts do depend on Sirach, they would be the earliest examples of direct Christian use of the book. A healthy number of Greek and Latin church fathers, including Clement of Alexandria, Origen, John Chrysostom, Tertullian, Jerome and Augustine, use Sirach in their writings, and as early as Clement of Alexandria Sirach is cited as scripture, demonstrating the high regard the book came to have in Christian tradition ..."