La Calunnia by Sandro Botticelli (ca. 1497)

Quid est iustitia, nisi naturae tacita conventio, in adiutorium multorum inventa. Iustitia non nostra constitutio, sed divina lex est, vinculum societatis humanae.

St. Martin of Braga, Formula honestae vitae (ca. 550 A.D.)

What is justice but a tacit covenant of nature established for the aid of many.  Justice is not based on our statute but is a part of divine law and the bond of human society.

Stephan  Kuttner, "A forgotten definition of justice, Studia Gratiana 20 (1976) 73-110.