Esau when he was born was red and hairy, as if he had been already a grown man, whence he had his name Esau, made, reared already. This was an indication of a very strong constitution, and gave cause to expect that he would be a very robust, daring, active man. But Jacob was smooth and tender as other children.
Related Commentaries of Genesis 25:25
Genesis 25:25
25 And the first came out red, all over like an hairy garment; and they called his name Esau.