θείᾳ τύχῃ
From LSJ
τὸ δανείζεσθαι τῆς ἐσχάτης ἀφροσύνης καὶ μαλακίας ἐστίν → being in debt is a mark of extreme folly and moral weakness (Plutarch, On Avoiding Debt 829F3)
Greek > English (Woodhouse)
by divine interposition, by divine intervention, by the interposition of the gods