You shall not show partiality to a poor man in his dispute.
Exodus 23:3
Surrounding context
23:2 You shall not follow a crowd to do evil; nor shall you testify in a dispute so as to turn aside after many to pervert justice.
23:3 You shall not show partiality to a poor man in his dispute.
23:4 "If you meet your enemy's ox or his donkey going astray, you shall surely bring it back to him again.