εἰπέμεναι

From LSJ

μὴ δὶς πρὸς τὸν αὐτὸν λίθον πταίειν → do not stumble twice on the same stone

Source

French (Bailly abrégé)

épq. c. εἰπεῖν de ἔπω.

Russian (Dvoretsky)

εἰπέμεναι: и εἰπέμεν эп. = εἰπεῖν.