Jeremiah 34:18

18 Those who have violated my covenant and have not fulfilled the terms of the covenant they made before me, I will treat like the calf they cut in two and then walked between its pieces.

Read Jeremiah 34:18 Using Other Translations

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,
And the men who transgressed my covenant and did not keep the terms of the covenant that they made before me, I will make them likethe calf that they cut in two and passed between its parts--
Because you have broken the terms of our covenant, I will cut you apart just as you cut apart the calf when you walked between its halves to solemnize your vows.