Ps.81.9

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

Ps.81.9

Don't take up with strange gods, don't worship the latest in gods.

Ps.81.9

There shall be no foreign god among you; Nor shall you worship any foreign god.

Ps.81.9

You must never have a foreign god; you must not bow down before a false god.