на острие бритвы

From LSJ

Παρθένε, ἐν ἀκροπόλει Τελεσῖνος ἄγαλμ' ἀνέθηκεν, Κήττιος, ᾧ χαίρουσα, διδοίης ἄλλο ἀναθεῖναι → O Virgin goddess, Telesinos from the deme of Kettos has set up a statue on the Acropolis. If you are pleased with it, please grant that he set up another

Source

Russian > Greek

ἐπὶ ξυροῦ ἀκμῆς