Jeremiah 10:8 Halakhah

וּבְאַחַ֖ת יִבְעֲר֣וּ וְיִכְסָ֑לוּ מוּסַ֥ר הֲבָלִ֖ים עֵ֥ץ הֽוּא׃

But they are altogether brutish and foolish: The vanities by which they are instructed are but a stock;