When Jacob had cooked a stew one day, Esau came in from the field and he was exhausted.
Genesis 25:29 (NASB)
According to Baba Batra 16 Esau committed five different sins on that very day.
1) He slept with a girl who was betrothed to another man.
2) He killed a human being.
3) He scoffed at the idea of resurrection.
4) He denied the existence of G’d, and reward and punishment.
5) He despised the birthright.The Talmud finds allusions in Scripture to support all these allegations: The Torah describes Esau here as ויבא עשו מן השדה, and in connection with the prohibition of sleeping with a girl who is betrothed to another, the Torah worded this in Deut. 22,27 כי בשדה מצאה “for he found her in the field.” The choice of the words: “in the field” is not arbitrary but an allusion to what happened here.
The allusion to Esau committing murder is based on the words here כי עיף אנכי, “for I am exhausted,” and the verse in Jeremiah 4,31 כי עיפה נפשי להורגים, “for my soul is exhausted from killing.”
The allusion to Esau denying resurrection of the dead is based on Esau saying here הנה אנכי הולך למות, “here I am going towards death,” and Job 7,9 כלה ענן וילך כן יורד שאול לא יעלה, “as a cloud fades away, so whoever goes down to Sheol does not come up.”
As to Esau denying the existence of G’d and the system of reward and punishment, the sages point at the expression in our paragraph where Esau said למה זה לי, “what good is all this for me,” and the words זה אלי ואנוהו, “this is my G’d and I will glorify him;” this was the affirmation of G’d sung by the Jewish people after they had emerged from the sea and the Egyptians had been drowned in it (Exodus 15,2).
The fact that Esau despised the birthright needs no allusion as it is spelled out right here.Rabbeinu Bayha on Genesis 25:29