Genesis 26:26 New English Translation

²⁶Now Abimelech had come^[a] to him from Gerar along with^[b] Ahuzzah his friend^[c] and Phicol the commander of his army.

Genesis 26:26 tn The disjunctive clause supplies pertinent supplemental information. The past perfect is used because the following narrative records the treaty at Beer Sheba. Prior to this we are told that Isaac settled in Beer Sheba; presumably this treaty would have allowed him to do that. However, it may be that he settled there and then made the treaty by which he renamed the place Beer Sheba. In this case one may translate “Now Abimelech came to him.”
Genesis 26:26 tn Heb “and.”
Genesis 26:26 tn Many modern translations render the Hebrew term מֵרֵעַ (mereaʾ) as “councillor” or “adviser,” but the term may not designate an official position but simply a close personal friend.

New English Translation (NET)