Kommentar zu Jechezkiel 1:14

would run and return, like the appearance of the sparks Our Sages explained (Chag. 13b): They would run and return like the flame of a furnace, which constantly shoots out of the mouth of the furnace and hastens back to enter. So, when they would thrust their heads out from under the expanse that was extended above themas is delineated in the chapterthey would recoil because of the Shechinah, which is above the expanse, and they hasten to pull their heads [down].

like the appearance of the sparks Heb. הֲבָּזָק, de l’etincelle in French, and the color of their fire is like the color of the fire that emanates from between the shards within which gold is refined in a furnace. The fire that emanates from there is colored with these colors (ibid.). [Addendum—Others explain הַבָּזָק as an expression of scattering, as our Sages explained it (Gen. Rabbah 50:1): “like the appearance of the bazak” R. Judah in the name of R. Simon in the name of R. Levi the son of Perata: Like one who scatters (הַבּוֹזֵק) ‘gefeth’ in a stove, i.e., he scatters ‘gefeth’ the residue of olives in a stove: it ignites quickly and raises a flame, and the flame ascends and descends, and this is the meaning of “would run and return.” Furthermore we find in their words (Sanh. 108b, according to Aruch) בזק used as an expression of scattering: “He scattered (בָּזַק) dust on them and it turned into swords,” meaning he scattered, and so in the Mishnah (Eruvin 10:14): “We may scatter (בּוֹזְקִין) salt on the ramp so that they should not slip.” בזק may also be defined as ברק (lightning), which is an expression of searching. End of addendum, not found in (sic) all editions.]