חֶלְבָּ֥מוֹ סָּגְר֑וּ פִּ֝֗ימוֹ דִּבְּר֥וּ בְגֵאֽוּת׃
זײער פֿעט האַרץ האָבן זײ פֿאַרשלאָסן, מיט זײער מױל רעדן זײ האָפֿערדיק.
Rashi
[With] their fat, they closed themselves up With their fat, they closed their heart and their eyes from looking at Your deeds, in fear of You.
Radak
With their fat they have enclosed their mouth; they speak proudly. – Their great sleekness has enclosed their mouth. By reason of their great luxury they speak proudly.