Genesis 25:9 - Wesley's Explanatory Notes

Here is nothing recorded of the pomp or ceremony of his funeral; only we are told, his sons Isaac and Ishmael buried him — It was the last office of respect they had to pay to their good father. Some distance there had formerly been between Isaac and Ishmael, but it seems either Abraham had himself brought them together while he lived, or at least his death reconciled them. They buried him, in his own burying — place which he had purchased and in which he had buried Sarah. Those that in life have been very dear to each other, may not only innocently, but laudably, desire to be buried together, that, in their deaths, they may not be divided, and in token of their hopes of rising together.