Justice without strength, and strength without justice: fearful misfortunes!

[La justice sans force, et la force sans justice: malheurs aflreux!]

Joseph Joubert (1754-1824) French moralist, philosopher, essayist, poet

Pensées [Thoughts], ch. 15 “De la Liberté, de la Justice et des Lois [On Liberty, Justice, and Laws],” ¶ 18 (1850 ed.) [tr. Calvert (1866), ch. 12]
    (Source)

(Source (French)). I could find no other translation of this. See Pascal (1670).