Barzillai in Wikipedia

the Gileadite of Rogelim was 80 years old at the time of Absalom's revolt against King David. Barzillai supplied provisions for David's army at Mahanaim (2 Samuel 17:27-29). After the death of Absalom, Barzillai, being an old man, was unable to accompany the king back to Jerusalem, but brought Chimham to David for the return journey (2 Samuel 19:31-37).

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