When an Israelite and a Gentile have a lawsuit before thee, if thou canst, acquit the former according to the laws of Israel, and tell the latter such is our law; if thou canst get him off in accordance with Gentile law, do so, and say to the plaintiff such is your law; but if he cannot be acquitted according to either law, then bring forward adroit pretexts and secure his acquittal. These are the words of Rabbi Ishmael.
Maurice H. Harris, Hebraic Literature; Translations from the Talmud, Midrashim and Kabbala
discrimination, injustice