הַיֹּֽשְׁבִים֙ בַּקְּבָרִ֔ים וּבַנְּצוּרִ֖ים יָלִ֑ינוּ הָאֹֽכְלִים֙ בְּשַׂ֣ר הַחֲזִ֔יר ופרק [וּמְרַ֥ק] פִּגֻּלִ֖ים כְּלֵיהֶֽם׃
That sit among the graves, and lodge in the vaults; that eat swine’s flesh, and broth of abominable things is in their vessels;
Rashi on Isaiah
They sit among the graves so that a spirit of defilement of demons should rest upon them.
Ibn Ezra on Isaiah
That sit among the graves, to inquire of the dead, and to listen to the spirits.
Rashi on Isaiah
and with corpses Heb. וּבַנְּצוּרִים. They are the bodies of the dead, who are as placed in a siege (מָצוֹר), unable to get out.