1. Mose 15:17

When the sun had gone down, and thick darkness had come on (היה impersonal), "behold a smoking furnace, and (with) a fiery torch, which passed between those pieces," - a description of what Abram saw in his deep prophetic sleep, corresponding to the mysterious character of the whole proceeding. תּנּוּר, a stove, is a cylindrical fire-pot, such as is used in the dwelling-houses of the East. The phenomenon, which passed through the pieces as they lay opposite to one another, resembled such a smoking stove, from which a fiery torch, i.e., a brilliant flame, was streaming forth. In this symbol Jehovah manifested Himself to Abram, just as He afterwards did to the people of Israel in the pillar of cloud and fire. Passing through the pieces, He ratified the covenant which He made with Abram. His glory was enveloped in fire and smoke, the produce of the consuming fire, - both symbols of the wrath of God (cf. Psa 18:9, and Hengstenberg in loc.), whose fiery zeal consumes whatever opposes it (vid., Exo 3:2). - To establish and give reality to the covenant to be concluded with Abram, Jehovah would have to pass through the seed of Abram when oppressed by the Egyptians and threatened with destruction, and to execute judgment upon their oppressors (Exo 7:4; Exo 12:12). In this symbol, the passing of the Lord between the pieces meant something altogether different from the oath of the Lord by Himself in Gen 22:16, or by His life in Deu 32:40, or by His soul in Amo 6:8 and Jer 51:14. It set before Abram the condescension of the Lord to his seed, in the fearful glory of His majesty as the judge of their foes. Hence the pieces were not consumed by the fire; for the transaction had reference not to a sacrifice, which God accepted, and in which the soul of the offerer was to ascend in the…

Here is, I. The covenant ratified (Gen 15:17); the sign which Abram desired was given, at length, when the sun had gone down, so that it was dark; for that was a dark dispensation. 1. The smoking furnace signified the affliction of his seed in Egypt. They were there in the iron furnace (Deu 4:20), the furnace of affliction (Isa 48:10), labouring in the very fire. They were there in the smoke, their eyes darkened, that they could not see to the end of their troubles, and themselves at a loss to conceive what God would do with them. Clouds and darkness were round about them. 2. The burning lamp denotes comfort in this affliction; and this God showed to Abram, at the same time that he showed him the smoking furnace. (1.) Light denotes deliverance out of the furnace; their salvation was as a lamp that burneth, Isa 62:1. When God came down to deliver them, he appeared in a bush that burned, and was not consumed, Exo 3:2. (2.) The lamp denotes direction in the smoke. God's word was their lamp: this word to Abram was so, it was a light shining in a dark place. Perhaps this burning lamp prefigured the pillar of cloud and fire, which led them out of Egypt, in which God was. (3.) The burning lamp denotes the destruction of their enemies who kept them so long in the furnace. See Zac 12:6. The same cloud that enlightened the Israelites troubled and burned the Egyptians. 3. The passing of these between the pieces was the confirming of the covenant God now made with him, that he might have strong consolation, being fully persuaded that what God promised he would certainly perform. It is probable that the furnace and lamp, which passed between the pieces, burnt and consumed them, and so completed the sacrifice, and testified God's acceptance of it, as of Gideon's (Jdg 6:21), Manoah's…

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.