'Body' in the Bible

Then behold, the word of the Lord came to him, saying, “This man [Eliezer] will not be your heir but he who shall come from your own body shall be your heir.”

The Lord said to her,“[The founders of] two nations are in your womb;And the separation of two nations has begun in your body;The one people shall be stronger than the other;And the older shall serve the younger.”

Now then, come and let us kill him and throw him into one of the pits (cisterns, underground water storage); then we will say [to our father], ‘A wild animal killed and devoured him’; and we shall see what will become of his dreams!”