NET
17 When the sun had gone down and it was dark, a smoking firepot with a flaming torch passed between the animal parts.
Darby
17 And it came to pass when the sun had gone down, and it was dark, that behold, there was a smoking furnace, and a flame of fire which passed between those pieces.
KJV
17 And it came to pass, that, when the sun went down, and it was dark, behold a smoking furnace, and a burning lamp that passed between those pieces.