ὅπου γὰρ ἰσχὺς συζυγοῦσι καὶ δίκη
ποία ξυνωρὶς τῆσδε καρτερωτέρα
For where might and justice are yoke-fellows —
Aeschylus, Fragments of Uncertain Plays (#209), the Herbert Weir Smith translation (Loeb Library, Aeschylus II).
What pair is stronger than this?