"Hear what the LORD is saying: Come, present [My] case before the mountains, And let the hills hear you pleading."
This is to be interpreted as a hint that when a person reprimands even wealthy people without pretense, then the remaining, less privileged people, will certainly heed their words: Present My case before the mountains – refers to the wealthy, which will bring about that "the hills hear you pleading" – refers the simple folk.