Barzillai was a very aged man, eighty years old. He had provided the king with food while he stayed at Mahanaim, for he was a very wealthy man.
David had already graced the triumphs of his restoration with the generous remission of the injuries that had been done to him; we have him here gracing them with a no less generous reward of the kindnesses that had been shown to him.
Commenting on 2 Samuel 19:31-39
Now Barzillai was a very aged man, even fourscore years old,.... Which was ten years beyond the common term of man's life, and reckoned a very great age in David's time, and has been ever since, and still is, see Psa 90:10, and he had provided the king of sustenance while he lay at Mahanaim: had supported him and his family, furnished him with provisions...
THE ISRAELITES BRING THE KING BACK. (2Sa. 19:9-43) all the people were at strife throughout all the tribes of Israel--The kingdom was completely disorganized. The sentiments of three different parties are represented in Sa2 19:9-10 : the royalists, the adherents of Absalom who had been very numerous, and those who were indifferent to the Davidic dynasty.
Commenting on 2 Samuel 19:9-43