Adam Clarke on Psalms 82:1

God standeth in the congregation of the mighty - The Hebrew should be translated, "God standeth in the assembly of God." God is among his people; and he presides especially in those courts of justice which himself has established. The Court of King's Bench is properly the place where the king presides, and where he is supposed to be always present. But the kings of England seldom make their appearance there. King James I sometimes attended: at such times it might be said, "The king is in the king's court." I believe the case above to be similar. Judges! beware what you do! God is in his court, and in the midst (of the assembly) God will judge. See Parkhurst under אלה.