'Swear to Me' in the Bible

Now, therefore, swear to me here by God that you will not deal falsely with me, nor with my son, nor with my son's son. But according to the kindness that I have done to you, you shall do to me, and to the land in which you have lived as a foreigner."

Jacob said, "Swear to me first." He swore to him. He sold his birthright to Jacob.

He said, "Swear to me," and he swore to him. Israel bowed himself on the bed's head.