וְכֵ֣ן עָשָׂ֔ה לְכָל־נָשָׁ֖יו הַנָּכְרִיּ֑וֹת מַקְטִיר֥וֹת וּֽמְזַבְּח֖וֹת לֵאלֹהֵיהֶֽן׃
And so did he for all his foreign wives, who offered and sacrificed unto their gods.
Read midrashic interpretation of I Kings 11:8: and classical rabbinic exegesis.