After this, Abraham buried Sarah his wife in the cave of the field of Machpelah east of Mamre (that is, Hebron) in the land of Canaan. The field and the cave that is in it were made over to Abraham as property for a burying place by the Hittites.
I make just a really brief observation from this text. Sarah has lived a long life and has died. Abraham now must find a burial plot in the land of his sojourn, Canaan. With her death comes the first physical purchase of land that Abraham has made: The burial plot near Hebron. There his beloved wife's body is laid to rest. There, he too will be buried. The first bit of the promised land to come to Abraham was a cemetery and cave. But it is a tangible bit of the promise of God.
And so it is that even in sorrows, God can visit us with His promise. I doubt that Abraham was greatly comforted with the knowledge that he now possessed a deed to land in the place God promised to give him. At least not while he was mourning Sarah. But it was true. God moved, even in great loss, to secure His covenant and keep His Word.