"... Since there was uncertainty about which books should be in and which should be out, it is also possible that during this time some would have considered other books, such as the ones now called apocryphal and pseudepigraphal, to have been “sacred writings.” We know this is the case at Qumran, where books like Jubilees and Enoch were treated as authoritative scripture, and some works scholars have called “rewritten scripture” were likely produced to replace biblical books. As we noted already, the writer of the late first-century Jewish apocalypse found in 2 Esdras 3-14 (and also called 4 Ezra) claimed there were many more writings that at least some Jews considered to have been useful for the same purposes for which Timothy was encouraged. This period of textual plurality and openness with regard to the boundaries of scripture means that it is even likely the earliest Christians considered books like the Wisdom of Solomon and Ecclesiasticus [Sirach] as part of the “sacred writings” useful for Christian formation ..."

Law, Timothy Michael When God Spoke Greek: The Septuagint and the Making of the Christian Bible (p. 90) Oxford University Press, 2013