TgJ Is66:1 :שְמַיָא כוּרסֵי יְקָרִי וְאַרעָא כֵיבַש קְֹדָמַי‏ : the heavens are the throne of my glory and the earth a footstool before me
See the entire entry for kəḇeš/kēbaš, kiḇšā n.m. path; footstool