And I will give the men that have transgressed my covenant, which have not performed the words of the covenant which they had made before me, when they cut the calf in twain, and passed between the parts thereof, When they cut the calf in twain, and passed between the parts thereof - This was the ancient and most solemn way of making a covenant.
1. A calf as sacrifice was offered to God to secure his approbation and support.
2. The victim was then exactly divided from the nose to the rump; the spinal marrow being divided longitudinally, in the most careful manner, that the half of it might remain on each side.
3. These divided parts were laid opposite to each other, a passage being left between them.
4. The contracting parties entered this passage at each end, met in the middle, and there took the covenant oath; adjudging themselves to death should they break this covenant.
5. Then they both feasted on the victim. In reference to this last circumstance, God says he will give their bodies for meat to the fowls of heaven and to the beasts. This is a farther conformity between the crime and the punishment. See my notes on Genesis 15:9-17 (note).