Reference for Psalms 50:7

שִׁמְעָ֤ה עַמִּ֨י ׀ וַאֲדַבֵּ֗רָה יִ֭שְׂרָאֵל וְאָעִ֣ידָה בָּ֑ךְ אֱלֹהִ֖ים אֱלֹהֶ֣יךָ אָנֹֽכִי׃

'Hear, O My people, and I will speak; O Israel, and I will testify against thee: God, thy God, am I.

BDB