LSJ cites the following: Or.1157, cf. Jb.28.15, al.; τῆς ψυχῆς Ev.Matt.16.26, cf. Fr.110H.'.
The last is a fragment on p. 110 of J. Rendel Harris (ed.) Fragments of Philo Judaeus (Cambridge, 1886).
The passage in question reads (from Cod.Rup.f. 261b, also 'Anton Melissa col. 1184': see Migne, Patrologia Graeca vol. 136):
ἀπὸ ἑνὸς συνετοῦ συνοικισθήσεται πόλις
οὔκ ἐστιν ἀντάλλαγμα πεπαιδευμένης ψυχῆς.
Harris says no more about these two lines. Since Moulton-Milligan does not have an entry for ἀντάλλαγμα, that collection was not the source for LSJ here.
The first line is Siracides 16.4a (followed by φυλὴ δὲ ἀνόμων ἐρημωθήσεται), the second Siracides 26.14b (following from δόσις κυρίου γυνὴ σιγηρά).
Although the combination of these two lines might be regarded as a fragment of Philo, the instance should be cited from Siracides.