Iliad 24.527–530

δοιοὶ γάρ τε πίθοι κατακείαται ἐν Διὸς οὔδει

δώρων οἷα δίδωσι κακῶν, ἕτερος δὲ ἑάων·

ᾧ μέν κʼ ἀμμίξας δώῃ Ζεὺς τερπικέραυνος,

ἄλλοτε μέν τε κακῷ ὅ γε κύρεται, ἄλλοτε δʼ ἐσθλῷ·

For two jars stand upon the floor of Zeus,

holding the gifts he gives: one of evils, one of blessings.

When Zeus who delights in thunder mixes them for a man,

he meets with evil at one time, with good at another.