Genesis 15:17

“And it came to pass, when the sun went down, etc.] It was going down when the deep sleep fell on Abram, and now it was quite gone or set: and it was dark; which is not always the case as soon as the sun is set, there is a twilight for a while, and if a clear night the stars appear; but, as Aben Ezra observes, this was a dark and cloudy night; so it was a dark night, a time of great affliction and distress to the posterity of Abram, when their sun was set, or after the death of Joseph: behold a smoking furnace; or the likeness of one, as Aben Ezra notes; for all this was represented in a visionary way to Abram, and was an emblem of the great troubles and afflictions of the children of Israel…”

“- The Faith of Abram 1. דבר dābār, “a word, a thing;” the word being the sign of the thing. 2. אדני 'ǎdonāy, “Adonai, the Lord;” related: “bring down, lay down.” This is the name usually read in place of Yahweh; but when, as in the present case, יהוה yehovâh and אדני 'ǎdonāy are in apposition, אלהים 'ĕlohı̂ym is read instead of the former. The Jews from a feeling of reverence avoided the utterance of this sacred name except on the most solemn occasions. This is said to have arisen from a stringent interpretation of Leviticus 24:16. According to some, this name was pronounced only once a year by the high priest, on the day of atonement, in the Holy of Holies, and according to others…”

“15:17-18 smoking firepot . . . flaming torch: Fire represented the Lord’s cleansing, consuming zeal and unapproachable holiness (cp. Isa 6:3-7). The holy God made (literally cut) a unilateral covenant with Abram; its promises were absolutely sure because they did not depend on what Abram or his descendants might do.”