Jacob said, "So then, swear to me." Esau swore to him, and he sold his right of the firstborn
Other versions
King James Version
And Jacob said, Swear to me this day; and he sware unto him: and he sold his birthright unto Jacob.English Standard Version
Jacob said, "Swear to me now." So he swore to him and sold his birthright to Jacob.New International Version
But Jacob said, "Swear to me first." So he swore an oath to him, selling his birthright to Jacob.