Iustitia est constans et perpetua voluntas ius suum cuique tribuendi.
Iuris praecepta sunt haec: I. honeste vivere, II. alterum non laedere, III. suum cuique tribuere.
Justice is the constant and perpetual will to give each their due.
The precepts of law are these: I. To live honorably, II. To harm no one, III. To give each their own.
Corpus Iuris Civilis, Ulpian