9 There shall be no strange god in you, neither shall you worship any foreign god.
Psalms 81:9 Cross References - WEB
Exodus 20:3-5
3 “You shall have no other gods before me.
4 “You shall not make for yourselves an idol, nor any image of anything that is in the heavens above, or that is in the earth beneath, or that is in the water under the earth:
5 you shall not bow yourself down to them, nor serve them, for I, Yahweh your God, am a jealous God, visiting the iniquity of the fathers on the children, on the third and on the fourth generation of those who hate me,
Deuteronomy 6:14
14 You shall not go after other gods, of the gods of the peoples who are around you,
Deuteronomy 32:12
12 Yahweh alone led him. There was no foreign god with him.
Psalms 44:20
20 If we have forgotten the name of our God, or spread out our hands to a strange god,
Isaiah 43:12
12 I have declared, I have saved, and I have shown, and there was no strange god among you. Therefore you are my witnesses”, says Yahweh, “and I am God.
Malachi 2:11
11 Judah has dealt treacherously, and an abomination is committed in Israel and in Jerusalem; for Judah has profaned the holiness of Yahweh which he loves, and has married the daughter of a foreign god.