This only is denied even to God,
The power to make what has been done undone.
μόνου γὰρ αὐτοῦ καὶ θεὸς στερίσκεται,
ἀγένητα ποιεῖν ἅσσ᾿ ἂν ᾖ πεπραγμένα.
ἀγένητα ποιεῖν ἅσσ᾿ ἂν ᾖ πεπραγμένα.
Original text (Ancient Greek)
Notes from Wikiquote
Not even the gods can change the past.