A brief reading from John Calvin's Commentary on Psalm 81:7-9.

KJV

7 Thou calledst in trouble, and I delivered thee; I answered thee in the secret place of thunder: I proved thee at the waters of Meribah. Selah.

8 Hear, O my people, and I will testify unto thee: O Israel, if thou wilt hearken unto me;

9 There shall no strange god be in thee; neither shalt thou worship any strange god.