οὐκ ἔσθ' ὅπως τοῦτ' ἔστι τὸ τέρας οὐ Διὸς καταιβάτου

From LSJ

αὔριον ὔμμε‎ πάσας ἐγὼ λουσῶ Συβαρίτιδος ἔνδοθι λίμνας‎ → tomorrow I'll wash you one and all in Sybaris lake

Source

English > Greek (Woodhouse Quotes Reversed)

this must be the sign of Zeus descending in thunder