You must not distort justice: you shall not show partiality; you shall not take a bribe, for a bribe blinds the eyes even of the wise and twists the words even of the just.
This was to repay the violence done to the seventy sons of Jerubbaal and to avenge their blood upon their brother Abimelech, who killed them, and upon the lords of Shechem, who encouraged him to kill his brothers.