'Lentil' in the Bible

Jacob had cooked [reddish-brown lentil] stew [one day], when Esau came from the field and was famished;

and Esau said to Jacob, “Please, let me have a quick swallow of that red stuff there, because I am exhausted and famished.” For that reason Esau was [also] called Edom (Red).

Then Jacob gave bread and lentil stew to Esau; he ate, drank, got up, and went away. So Esau despised his birthright.