John Gill Commentary Genesis 25:11

"And it came to pass after the death of Abraham, that God blessed Isaac his son. And Isaac dwelt by Beer-lahai-roi." — Genesis 25:11 (ASV)

And it came to pass, after the death of Abraham, that God
blessed his son Isaac
Yet more and more, both with spiritual and temporal blessings; showing hereby, that, though Abraham was dead, he was not unmindful of his covenant, which should be established with Isaac, (Genesis 17:19) (Genesis 22:17Genesis 22:18) :

and Isaac dwelt by the well Lahairoi ;
which was near the wilderness of Beersheba and Paran, where Ishmael dwelt; so that they were not far from one another, see (Genesis 16:14) (Genesis 21:14Genesis 21:21) .