Source: Tafsir al-Ahlam al-Kabir (Ibn Sirin)
The judge in a dream is God Almighty or a jurist scholar. Whoever sees himself appointed as a judge will gain a high position and wisdom. His ruling with justice indicates his uprightness.
Source: Ta'tir al-Anam fi Ta'bir al-Manam (Al-Nabulsi)
The judge indicates dispute and justice. A ruling in his favor is relief, and a ruling against him is worry.
Source: Al-Isharat fi Ilm al-Ibarat (Ibn Shahin)
The judge is interpreted as a wise man. Disputing before him indicates seeking fairness.