Psalm 81:9 KJV
There shall no strange god be in thee; neither shalt thou worship any strange god.
Psalm 81:7–11 KJV Chapter Context
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.
10
I am the LORD thy God, which brought thee out of the land of Egypt: open thy mouth wide, and I will fill it.
11
But my people would not hearken to my voice; and Israel would none of me.