2 Samuel 19:34 - Joseph Benson’s Commentary on the Old and New Testaments

Barzillai said, How long have I to live, &c. In a spirit of true wisdom, and becoming moderation, he declined accepting the king's generous offer. The pleasures of a court had no charms for him in that advanced age, being then fourscore years old; his senses and appetites were long since palled, and both music and banquets had lost all their relish. He therefore begged the king to give him leave to wait upon him over the river, and then return to his own city, there to die in peace, and be laid in the grave of his father and his mother.