출애굽기 19:18 해설: Rashi, Or HaChaim, Rashbam & Rabbeinu Bahya

עשן כלו WAS ALTOGETHER ON A SMOKE — This word עָשַׁן is not a noun, because the ש is punctuated with Patach, but it has the meaning of “it was doing something”, similar to and אָמַר and שָׁמַר and שָׁמַע. On this account, its translation in the Targum is תָּנֵן כֻּלֵּהּ “it was altogether giving forth smoke” (תָּנֵן is a verb corresponding with the Hebrew עָשַׁן). and it does not translate it by תְּנָנָא (a noun denoting smoke, corresponding to Hebrew עָשָׁן). But wherever else the word עשן occurs in Scripture it is punctuated with Kametz because it is a noun.

והר סיני עשן כלו, and Mount Sinai was completely wrapped in smoke, etc. Fire dominated the Mountain itself and burned its stones so that they turned into limestone, just as in a furnace where stones are burned to make lime. The stones of Sinai became lime. When the Torah says: "the whole Mountain trembled," this is a description of the reaction of the stones when fire dominates them just as the stones in a furnace. The sounds that the stones give off are similar to the sound of someone trembling.

עשן כולו, the word עשן here is neither a proper construct mode, in which case it should have two vowels patach, nor is it completely “unattached,” as it would then have to have two vowels kametz. In other words, it is not a noun “smoke,” and not an adjective, “smoking.” It therefore must be a verbal mode. If it would be a noun it should follow the pattern of davar, devar, word, word of, or bakar, bekar, cattle, cattle of. (compare Numbers 7,88 בקר זבח השלמים).

הכבשן A FURNACE of lime (i. e. in which lime is burnt and which emits vast quantities of smoke). One might think that the mountain emitted smoke only like such a furnace and not to a greater degree! Scripture therefore states in another passage, (Deuteronomy 4:11) “[And the mountain] burned with fire unto the very midst of the heavens”. Then what reason is there for stating that it smoked only like a furnace? This is said in order to make intelligible to the human ear as much as it can understand: Scripture gives human beings an example (a comparison) which is well-known to them. A similar case is, (Hosea 11:10) “As a lion does He (God) roar”. But who gave the lion power if not He, and yet Scripture compares him only to a lion! But the reason is that we describe Him by comparing Him to His creatures in order to make intelligible to the human ear as much as it can understand. A similar example is: (Ezekiel 43:2) “And His voice was like the sound of many waters”. But who gave the waters a thunderous sound except He, and yet you describe Him by comparing Him to His handiwork — it is to make it intelligible to the human ear (Mekhilta).