Aeschylus

ὅπου γὰρ ἰσχὺς συζυγοῦσι καὶ δίκη
ποία ξυνωρὶς τῆσδε καρτερωτέρα

For where might and justice are yoke-fellows —
What pair is stronger than this?

Aeschylus, Fragments of Uncertain Plays (#209), the Herbert Weir Smith translation (Loeb Library, Aeschylus II).