Here "judgment" refers to the act of judging. Alternate translation: "Then I will approach you in order to judge you" (See: [[rc://en/ta/man/jit/figs-abstractnouns]])
That is, turning away the foreigner from gaining his rights. Depriving people of their rights is spoken of as if it were physically turning them away from oneself. Perhaps the idea is turning away someone who comes for a wrong to be set right. Alternate translation: "deny foreigners living in Israel the rights that they should have" (See: [[rc://en/ta/man/jit/figs-explicit]] and [[rc://en/ta/man/jit/figs-metaphor]])