וַיֹּ֥אמֶר בַּרְזִלַּ֖י אֶל־הַמֶּ֑לֶךְ כַּמָּ֗ה יְמֵי֙ שְׁנֵ֣י חַיַּ֔י כִּי־אֶעֱלֶ֥ה אֶת־הַמֶּ֖לֶךְ יְרוּשָׁלִָֽם׃
And Barzillai said unto the king: ‘How many are the days of the years of my life, that I should go up with the king unto Jerusalem?
Rashi on II Samuel
How many more years of life [do I have]. That I have to live.
Rashi on II Samuel
That I should go up. There are only a few left, [therefore] what pleasure will I have from your providing for me.