When they cut the calf in twain, &c.— That is, "When they made a solemn covenant and alliance with me, wherein it was usual to pass between the parts of the sacrifice; as Abraham is described to have done." Genesis 15:9; Genesis 15:21.
Related Commentaries of Jeremiah 34:18
Jeremiah 34:18
18 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,