Sforno on Genesis 21:33/ספורנו על בראשית כ״א:ל״ג

1ויקרא שם בשם ה' א-ל עולם, he used the occasion to proclaim the eternal nature of G’d, as opposed to any other deities, which, even if on occasion appearing to have demonstrated some power to protect those worshipping them, could at best enjoy a brief period of effectiveness.