= Timaeus, Platonic Lexicon 999a27; also in Photius (pi413 Theodoridis).
The headword (present indicative middle, first person singular, of pari/hmi) occurs twice in Plato, in Apology 17C and Republic 1.341B, both times in the general sense illustrated here (see LSJ s.v., VI.2). However, Phrynichus the Atticist (92) and Timaeus in an earlier lemma (998a7) quote the Republic passage (ou)de/n sou pari/emai), which can be taken as confirmation that it is the passage of relevance here too.
For other forms of the same verb, see pi 553, pi 591 through 593, pi 600, pi 601, pi 608, pi 609, pi 650, pi 651, pi 647 through pi 650.