Red pottage; red by the infusion of lentiles, or saffron, or some other things of that colour. The word is doubled in the Hebrew text, to show how vehemently he desired it. Edom, which signifies red; as he was at first so called from the colour of his hair, so now that name was confirmed and given to him afresh upon this occasion: q.d. He was rightly called Edom, or red, not only historically for his colour, but prophetically for this accident.
Related Commentaries of Genesis 25:30
Genesis 25:30
30 And Esau said to Jacob, Feed me, I pray thee, withc that same red pottage; for I am faint: therefore was his name called Edom.