Abraham’s burial of Sarah after she dies.
The chapter is dominated by the negotiations for the burial place for Sarah. The cultural significance is lost to me, but I do notice the honour and love which Abrahams character has earned, and its striking that he does not own land, very much the Jewish stranger in society thing already.
The covenant is all tied up in the promise of land, and here he is burying his wife in old age, and still no land.
A bit of googling pointed me to Hebrews 13, directly after the recount of Abrahams life:
13 All these people were still living by faith when they died. They did not receive the things promised; they only saw them and welcomed them from a distance, admitting that they were foreigners and strangers on earth
So it is an example of Abrahams faith. He is buying a little piece of the promise so that Sarah will rest in the land that he knows God will one day give him.