Jubilees 37
2And they strove with their father, saying 'Why has thy father given Jacob the portion of the elder and passed over thee, although thou art the elder and Jacob the younger'
3And he said unto them 'Because I sold my birthright to Jacob for a small mess of lentils, and on the day my father sent me to hunt and catch and bring him something that he should eat and bless me, he came with guile and brought my father food and drink, and my father blessed him and put me under his hand.
5And they said unto him, 'We shall not hearken unto thee to make peace with him; for our strength is greater than his strength, and we are more powerful than he; we shall go against him and slay him, and destroy him and his sons. And if thou wilt not go with us, we shall do hurt to thee also.
See also: Obadiah 1:10
7And their father said unto them, 'Do not go and do not make war with him lest ye fall before him.'
9And they sent to Aram, and to 'Aduram to the friend of their father, and they hired along with them one thousand fighting men, chosen men of war.
11And they said unto their father: Go forth with them and lead them, else we shall slay thee.'
12And he was filled with wrath and indignation on seeing that his sons were forcing him to go before (them) to lead them against Jacob his brother.
16But Jacob would not believe until they came very near to the tower.
17And he closed the gates of the tower; and he stood on the battlements and spake to his brother Esau and said, 'Noble is the comfort wherewith thou hast come to comfort me for my wife who has died. Is this the oath that thou didst swear to thy father and again to thy mother before they died Thou hast broken the oath, and on the moment that thou didst swear to thy father wast thou condemned.'
18And then Esau answered and said unto him, 'Neither the children of men nor the beasts of the earth have any oath of righteousness which in swearing they have sworn (an oath valid) for ever; but every day they devise evil one against another, and how each may slay his adversary and foe.
19And thou dost hate me and my children for ever. And there is no observing the tie of brotherhood with thee.
20Hear these words which I declare unto thee, If the boar can change its skin and make its bristles as soft as wool, Or if it can cause horns to sprout forth on its head like the horns of a stag or of a sheep, Then will I observe the tie of brotherhood with thee And if the breasts separated themselves from their mother, for thou hast not been a brother to me.
21And if the wolves make peace with the lambs so as not to devour or do them violence, And if their hearts are towards them for good, Then there shall be peace in my heart towards thee
22And if the lion becomes the friend of the ox and makes peace with him And if he is bound under one yoke with him and ploughs with him, Then will I make peace with thee.
24And when Jacob saw that he was (so) evilly disposed towards him with his heart, and with all his soul as to slay him, and that he had come springing like the wild boar which comes upon the spear that pierces and kills it, and recoils not from it;
25then he spake to his own and to his servants that they should attack him and all his companions.