Gênesis 15:10

10. Divided them in the midst Cut them into two halves, and placed the portions opposite to each other, with space enough for one to walk between . This explains the Hebrew expression כרת ברית , to cut a covenant . See Genesis 15:18. The two parts of the victim seem to have represented the two parties to the covenant; and when the two parties thus covenanting passed between the pieces, their union was represented as sealed by the blood of life. Comp. Jeremiah 34:18, and see further on Genesis 15:17.

Birds divided he not So also the Mosaic law, Leviticus 1:17. Probably Abram laid the dove on one side and the pigeon on the other, as if they were two pieces.