Phorbas was one of the paneides who were twelve young Panes, goat-legged rustic spirits or gods. The Panes, were, sons of the elder god Pan. They joined Dionysos in his war against the Indians.
Pan & Unknown Mother
"Now [in India] the hill the summit of which is inhabited by the sages is, according to the account of our travellers, of about the same height as the Akropolis of Athens; and it rises: straight up from the plain, though its natural position equally secures it from attack for the rock surrounds it on all sides. On many parts of this rock you see traces of cloven feet and outlines of beards and of faces, and here and there impressions of backs as of persons who had slipt--and rolled down. For they say that Dionysos, when he was trying to storm the place together with Herakles, ordered the Panes to attack it, thinking that they would be strong enough to take it by assault; but they were thunderstruck by the sages and fell one, one way, and another, another; and the rocks as it were took the print of the various postures in which they fell and failed."
- Philostratus, Life of Apollonius of Tyana 3. 13 (trans. Conybeare) (Greek biography C1st to C2nd A.D.)