This is an interesting passage that I often overlook. It starts out describing Abraham's other sons, whom I always forget about even existing. But of course if Abraham was to be the father of many nations he would have to have many sons.
And then Ishmael came back to bury his father. When he and Hagar leave I always assumed he never came back, I missed that he was there as well. That means that he would have been connected to the family enough to know that his father had died.
I'm not sure if I know the significance of either of these things, but like Beth said with a different passage I wanted to note a different passage that doesn't often get discussed.
