וַיֹּ֨אמֶר יְהוּדָ֜ה אֶל־יִשְׂרָאֵ֣ל אָבִ֗יו שִׁלְחָ֥ה הַנַּ֛עַר אִתִּ֖י וְנָק֣וּמָה וְנֵלֵ֑כָה וְנִֽחְיֶה֙ וְלֹ֣א נָמ֔וּת גַּם־אֲנַ֥חְנוּ גַם־אַתָּ֖ה גַּם־טַפֵּֽנוּ׃
猶大對他父親以色列說：«請打發這孩子與我同去，我們就起身前往，好叫我們得以存活，不至於死——我們、你，連我們的孩童都是如此。
Rashi
ונחיה THAT WE MAY LIVE — (literally, and we shall live). The spirit of prophecy was enkindled within him. He said: owing to this journey your spirit will live again, which indeed happened, as it is said, (Genesis 45:27) “And the spirit of Jacob, their father, revived”.
Radak
גם אנחנו גן אתה גם טפנו, each one in addition to the one already mentioned. What Yehudah meant was it was better that one Binyamin should come along with them although his safe return was subject to some doubt, than they should all die, something which would be a certainty.
Or HaChaim
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ולא נמות AND THAT WE MAY NOT DIE of hunger. As for Benjamin it is doubtful whether he will be seized or whether he will not be seized, but as for us, we shall certainly all die of hunger if we do not go. It is better that you should let go what is doubtful and snatch at what is certain (Genesis Rabbah 91:6).