Leviticus 19:15

I am the Lord your God; you shall not do an unjust thing in the execution of justice: thou shalt not respect the face of the poor, nor revere the face of the mighty. With righteousness thou shalt judge thy neighbour.

Thou shalt not act unjustly in judgment: thou shalt not accept the person of the poor, nor admire the person of the mighty; with justice shalt thou judge thy neighbour.