Theophylact of Ohrid — on Rom 11:15 (Commentary on Romans)

“If, he says, having been angered at them, He granted so much to others and made enemies into friends, what will He not grant when He receives them? Then there will be "life from the dead," that is, unending blessings; for He indicates these by the word "life." At the same time, he also hints at something more exalted, namely that just as the resurrection from the dead will not depend on the acceptance of the Jews, so too the salvation of others will not depend on them either, if they do not have faith. All of this he says seemingly in favor of the Jews, offering them a refreshing drink, as physicians often do with the gravely ill.”