by the interposition of the gods
From LSJ
τὸ κοῖλον τοῦ ποδὸς δεῖξαι → show the heels, show a clean pair of heels, show the hollow of the foot, run away
English > Greek (Woodhouse Extra)
θείᾳ τύχῃ, ἐκ θείας τύχης, κατὰ θεῖον
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