The injustice of punishing those who have done no wrong is easily seen by everyone, and God will not tolerate it. This prince, here, is not speaking of title, but of someone who is honorable and fair. Only someone who was evil would strike out and punish the just or those with a princely nature. Many saints have been martyred for the Word of God, but God will judge harshly those who punish the just.
In the New American Standard Edition translation, this says “It is also not good to fine the righteous, Nor to strike the noble for their uprightness.” This then gives a clear statement on political and religious injustice, focusing on the equally bad mistreatment of the innocent and the noble.