Genesis 25:33

and that no one becomes immoral or ungodly, like Esau, who sold his right to the firstborn son's inheritance for a single meal.

And he vowed to her, "I will give you whatever you ask me for, up to one half [the wealth] of my kingdom."

For people make vows by someone greater [than themselves], and an argument is settled when someone takes an oath [that he is telling the truth].

Treasury of Scripture Knowledge

And Jacob said, Swear to me this day; and he sware unto him: and he sold his birthright unto Jacob.

And he vowed to her, "I will give you whatever you ask me for, up to one half [the wealth] of my kingdom."

For people make vows by someone greater [than themselves], and an argument is settled when someone takes an oath [that he is telling the truth].

and that no one becomes immoral or ungodly, like Esau, who sold his right to the firstborn son's inheritance for a single meal.