I came across this in Charmides, although it seems to be quoted many places. Apparently it was an inscription at Delphi. In Charmides it’s quoted as ἐγγύη πάρα δ᾿ ἄτη.
I see it explained in the LSJ by a comma as “ἐγγύη, πάρα δ᾿ ἄτη”, with πάρα for πάρεστι, I assume.
Is it meant to be taken as a warning against taking/giving pledges (similar to Matt 5:34, James 5:12), or is it saying that an ἐγγύη is a sacred thing, backed by ἄτη? I assume the ἐγγύη would be thought of as an actual physical security.
The LSJ gives a related quote in the ἐγγύη article: ἐγγύας ἄτα 'στι θυγάτηρ, ἐγγύα δὲ ζαμίας
The marriage interpretation seems unlikely, but Euripides seems to interpret this as a warning against giving oneself as security? (I remember this being a bad idea in Andocides.) Does present-tense σκοπῶν mean that the Euripides character is actually at Delphi reading τὰ γράμματα?
EDIT:
Ignore the last question. ἐᾷ is finite, so τὰ Πυθοῖ δ᾽ οὐκ ἐᾷ με γράμματα is a separate sentence, not an elaboration on the ζημίαν that he sees.
As far as I can see, everyone reads it as a warning against pledges, e.g.,:
95 Ἐγγύα πάρα δʼ ἄτη, an old saying on the rashness of giving a pledge, is quoted in a fragment of Cratinus, the elder rival of Aristophanes. Cf. Proverbs xi. 15—”He that is surety for a stranger shall smart for it.”
Plato. (1955). Plato in Twelve Volumes translated by W.R.M. Lamb. (Vol. 8 ). Medford, MA: Cambridge, MA, Harvard University Press; London, William Heinemann Ltd.
I notice that the LXX version is very different for Pr 11:15.
πονηρὸς κακοποιεῖ, ὅταν συμμείξῃ δικαίῳ, μισεῖ δὲ ἦχον ἀσφαλείας.
A bad man does ill, whenever he mixes with a just man, and he hates the sound of security.
My guess is that the LXX translator read the nifal יֵ֭רוֹעַ as a qal, which neatly explains the first part of his rendering (doing evil rather than experiencing it). I’m not so sure how we get συμμείξῃ δικαίῳ out of עָ֣רַב זָ֑ר, however, perhaps a different Vorlage altogether? תָּקַע can mean striking or clapping the hands, together with בּוֹטֵֽחַ, “in trust” the idea of agreeing to a pledge, but it’s fairly clear how the LXX translator came up with “sound.” The Vulgate:
adfligetur malo qui fidem facit pro extraneo qui autem cavet laqueos securus erit
Which is much closer to the sense of the Masoretic text, but still not quite accurate.