(These are the years of the life of Ishmael: 137 years. He breathed his last and died, and was gathered to his people.)
Immediately after the account of Abraham's death, Moses begins the story of Isaac (Gen 25:11), and tells us where he dwelt and how remarkably God blessed him. Note, The blessing of Abraham did not die with him, but survived to all the children of the promise.
Commenting on Genesis 25:11-18
And these are the years of the life of Ishmael, an hundred and thirty and seven years,.... one hundred and thirty seven years old. So that he lived forty eight years after the death of Abraham, Gen 25:8; and, though he did not live to be so old as he, yet it was a considerable age he attained unto; see Gill on Gen 25:7, and...
And these [are] the years of the life of Ishmael, an hundred and thirty and seven years: and he gave up the ghost and died; and was gathered unto his people. (f) Who dwelt among the Arabians, and were separate from the blessed seed.