I am looking for typical phrases which are said when commemorating a dead person, like epitaphs. Are there any known greek phrases? I don’t know where to search, but maybe you know some literature hints or are sufficiently fluent in ancient greek to come up with your own suggestions. I would be also interested to have translations of the latin “in memoriam” or “requiescat in pace” into greek. But just state everything which comes to your mind!
This isn’t exactly what you’re looking for… But if you were standing on the grave of your worst enemy, you might quote the Odyssey (1.47):
ὡς ἀπόλοιτο καὶ ἄλλος, ὅτις τοιαῦτά γε ῥέζοι
“Let anyone who did what he did die like that.”
This is what Scipio Aemilianus said, according to legend, when Tiberius Gracchus was murdered.