C. F. Keil and Franz Delitzsch on Genesis 25:11

Gen 25:11

After Abraham’s death the blessing was transferred to Isaac, who took up his abode by Hagar’s well, because he had already been there, and had dwelt in the south country (Gen 24:62). The blessing of Isaac is traced to Elohim, not to Jehovah; because it referred neither exclusively nor pre-eminently to the gifts of grace connected with the promises of salvation, but quite generally to the inheritance of earthly possessions, which Isaac had received from his father.