The headword phrase is possibly though not necessarily extracted from the quotation given. It also occurs in (e.g.) Plato, Laws 944B (in a list of the various circumstances which might mitigate the crime of abandoning one's weapons). Note also r(u/sis u(da/twn in Plutarch, Moralia 1005D.)
[1] For r(eu=sis see under rho 213. For the headword itself, cf. the dream-interpretation at pi 2124.
[2] Quotation unidentifiable. (Adler notes that Roos attributed it to Arrian without actually including it amongst the fragments.)