no other can be compared to him!
He found the whole way to knowledge,
and gave her to Jacob his servant
and to Israel whom he loved.
Afterward she appeared on earth
and lived among men.
Baruch 3:35-37, RSV (36-38, LXX). "She is the book of the commandments of God, and the law that endures for ever [(αὕτη ἡ βίβλος τῶν προσταγμάτων τοῦ θεοῦ καὶ ὁ νόμος ὁ ὑπάρχων εἰς τὸν αἰῶνα)]" (4:1). So the "she" (πᾶσαν ὁδὸν) comes from the context and 4:1 (αὕτη) explicitly.
I was put onto this by Aidan Nichols, The chalice of God: a systematic theology in outline (Collegeville, MN: Liturgical Press, 2012), 34.