C. F. Keil and Franz Delitzsch on Leviticus 19:15

Lev 19:15

In judgment, i.e., in the administration of justice, they were to do no unrighteousness: neither to respect the person of the poor (πρόσωπον λαμβάνειν, to do anything out of regard to a person, used in a good sense in Gen 19:21, in a bad sense here, namely, to act partially from unmanly pity); nor to adorn the person of the great (i.e., powerful, distinguished, exalted), i.e., to favour him in a judicial decision (see at Exo 23:3).