쉐모트 (출애굽기) 34:15

ואכלת מזבחו AND THOU EAT OF HIS SACRIFICE — You might perhaps think that there is no punishable offence in eating of it, this is not so, but I will account it unto you as though you consent to his idolatrous worship because through this (through partaking of his meals) you will be induced to take your daughters unto your sons (cf. Avodah Zarah 8a).

פֶּן־תִּכְרֹ֥ת בְּרִ֖ית לְיוֹשֵׁ֣ב הָאָ֑רֶץ וְזָנ֣וּ ׀ אַחֲרֵ֣י אֱלֹֽהֵיהֶ֗ם וְזָבְחוּ֙ לֵאלֹ֣הֵיהֶ֔ם וְקָרָ֣א לְךָ֔ וְאָכַלְתָּ֖ מִזִּבְחֽוֹ׃

lest thou make a covenant with the inhabitants of the land, and they go astray after their gods, and do sacrifice to their gods, and call thee, and thou eat of their sacrifice;