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כל יצא צבא. מַגִּיד שֶׁאֵין יוֹצֵא בַּצָּבָא פָּחוּת מִבֶּן עֶשְׂרִים: כל יצא צבא [FROM TWENTY YEARS OLD AND UPWARDS] ALL THAT GO FORTH TO THE HOST — This tells us that no one less than twenty years of age goes forth to the host (cf. Rashi on Exodus 30:14 and Note thereon).