Commentary for II Samuel 19:33

וּבַרְזִלַּי֙ זָקֵ֣ן מְאֹ֔ד בֶּן־שְׁמֹנִ֖ים שָׁנָ֑ה וְהֽוּא־כִלְכַּ֤ל אֶת־הַמֶּ֙לֶךְ֙ בְּשִׁיבָת֣וֹ בְמַחֲנַ֔יִם כִּֽי־אִ֛ישׁ גָּד֥וֹל ה֖וּא מְאֹֽד׃

Now Barzillai was a very aged man, even fourscore years old; and he had provided the king with sustenance while he lay at Mahanaim; for he was a very great man.

Rashi on II Samuel