30 And Esau said to Jacob, Feed me, I pray thee, with that same red pottage, for I am faint; therefore was his name called Edom. 31 And Jacob said, Sell me this day thy birthright. 32 And Esau said, Behold, I am at the point to die; and what profit shall this birthright do to me? 33 And Jacob said, Swear to me this day; and he sware unto him; and he sold his birthright unto Jacob. 34 Then Jacob gave Esau bread and pottage of lentiles; and he did eat and drink, and rose up, and went his way. Thus Esau despised his birthright. In these verses we have the account of Abraham's second marriage, and the birth of several sons. It does not seem clear from the text whether Keturah was a legal wife, or one of the Patriarch's numerous concubines. Clarke inclines to the latter idea, on account of Abraham's age, and then he gave all that be had to Isaac, and left Keturah's sons to share with those of other concubines, to whom he gave gifts and sent them away from his son Isaac to an eastern country. Abraham evidently thought that the descendants of Isaac might be superior in moral probity to those of his other sons, hence he desired to keep Isaac as exclusive as possible. But Jacob and Esau did not fulfill the Patriarch's expectations. Esau in selling his birthright for a mess of pottage, and Jacob taking advantage of his brother in a weak moment, and overreaching him in a bargain, alike illustrate the hereditary qualities of their ancestors. Genesis xxvi. 6 And Isaac dwelt in Gerar. 7 And the men of the place asked him of his wife; and he said, She is my sister; for he feared to say, She is my wife; lest, said he, the men of the place should kill me for Rebekah; because she was fair to look upon. 9 And Abimelech called Isaac, and said Behold, or a surety she is thy wife; and how saidst thou, She is my sister? And Isaac said unto him, Because I said, Lest I die for her. 11 And Abimelech charged all his people, saying, He that toucheth this man or his wife shall surely be put to death. 34 And Esau was forty years old when he took to wife Judith the daughter of Beeri the Hittite, and Bashemath the daughter of Elon the Hittite; 35 Which were a grief of mind unto Isaac and to Rebekah. The account of the private family affairs of Isaac and Rebekah; their partiality to different sons; Jacob, aided and abetted by his mother, robbing his elder brother of both his birthright and his father's blessing; the parents on one of their eventful journeys representing themselves as brother and sister, instead of husband and wife, for fear that some potentate might kill Isaac, in order to possess his beautiful wife; all these petty deceptions handed down from generation to generation, show that the law of heredity asserted itself even at that early day.