Genesis 23:13-16

23:13 and said to Ephron in their hearing, “Hear me, if you will. I pay to you the price of the field. Take it from me so that I may bury my dead there.”

23:14 Ephron answered Abraham, saying to him, 23:15 “Hear me, my lord. The land is worth 400 pieces of silver, but what is that between me and you? So bury your dead.”

23:16 So Abraham agreed to Ephron’s price and weighed out for him the price that Ephron had quoted in the hearing of the sons of Heth – 400 pieces of silver, according to the standard measurement at the time.