Psalm 81:9 in the World English Bible
There shall be no strange god in you, neither shall you worship any foreign god.
Context
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.