Charles Ellicott Commentary Psalms 50:7

"Hear, O my people, and I will speak; O Israel, and I will testify unto thee: I am God, [even] thy God." — Psalms 50:7 (ASV)

Hear. —The actual judgment now opens, God asserting in impressive tones His right to preside: God, thy God, I ... the Elohistic form of the more usual “Jehovah, thy God.”