1 Kings 1:51

Let king Solomon swear unto me to day The word translated to daysignifies rather -first of all," i.e. before I will venture to come away from my place of safety. The same word is found twice in the narrative of the sale of Esau's birthright, Genesis 25:31; Genesis 25:33. When Esau has asked for pottage, Jacob says "Sell me first of all (A.V. this day) thy birthright" and afterwards "Swear to me first of all."