Commentary Par XXV 4

For fuor mi serra (locks me out), see the envoy of Rime CXVI, the so-called 'Montanina': 'My mountain song, go your way.  Perhaps you will see Florence, my city, that shuts me out from her [che fuor di sè mi serra], void of love and stripped of compassion' (tr. Foster and Boyde).  The self-citation was first noted by Tommaseo (DDP Tommaseo.Par.XXV.4-6).

And see Velli (Vell.2002.1), p. 88, first demonstrating a clear dependency of elements in Rime C, 'Io son venuto,' very likely the first among the rime petrose to be composed, on Ovid's Tristia, and then, p. 92, for the curious relationship among Virgil ({Virg.Georg.III.365}), several lines of Ovid's in the Tristia and ex Ponto, 'Io son venuto' (Rime.C.1-5), [Inf XXXIII 22], and this verse.