The Muratorian Fragment oddly includes the Wisdom
of Solomon, an OT apocryphal and pseudonymous writing, in a New Testament
list (lines 69-70). This is highly unusual and has only parallels in the fourth
century as we see in Eusebius who lists Irenaeus’ Christian scripture collection
which also includes Wisdom of Solomon (Hist. eccl. 5.8-1-8; ca.
325-330). We see the same later in Epiphanius (Pan. 76.5; fl. ca.
375-403). . . . A more likely explanation for this anomaly in the fourth
century is that Wisdom of Solomon was a highly prized book, but by that
time some church fathers knew that the Jews had excluded it from the HB canon
and then some Christians had also excluded it from their OT canon. Consequently
some church fathers included it in their NT. Further, since Wisdom of Solomon
is missing in the Jewish canon lists, including in those Christian lists that
followed the Jewish canon of Scriptures . . . some church fathers added Wisdom
to a NT list. (Lee Martin McDonald, The Formation of the Biblical Canon,
2 vols. [London: Bloomsbury T&T Clark, 2017], 2:287, 289)
