He calls on the heavens above and earth below
    to witness the judgment of his people.
⁵ “Bring my faithful people to me—
    those who made a covenant with me by giving sacrifices.”
⁶ Then let the heavens proclaim his justice,
    for God himself will be the judge. Interlude Psalm 50:4-6

According to these verses who is judgment for? What is it for?