David appeals to the justice of the Lord. His prayer is from the heart. Note the repeat: arise,
lift yourself up,
awake.
God never sleeps nor slumbers (Psalm 121:4). Under the law, the Lord must bring the enemy to a stop. This is what he is known for. See also Psalm 94:15 for justice will return to the righteous.
For this, he can engage the earthly rulers. And so this matter becomes something of world importance. They seem like a jury in a court, in service of the Lord. But the Lord God is the highest adjudicator in the court. We can assume that the poet is a king.
7 Lève-toi, ô Eternel! dans ta colère,Lève-toi contre la fureur de mes adversaires,Réveille-toi pour me secourir, ordonne un jugement!