וַיְמַן֩ לָהֶ֨ם הַמֶּ֜לֶךְ דְּבַר־י֣וֹם בְּיוֹמ֗וֹ מִפַּת־בַּ֤ג הַמֶּ֙לֶךְ֙ וּמִיֵּ֣ין מִשְׁתָּ֔יו וּֽלְגַדְּלָ֖ם שָׁנִ֣ים שָׁל֑וֹשׁ וּמִ֨קְצָתָ֔ם יַֽעַמְד֖וּ לִפְנֵ֥י הַמֶּֽלֶךְ׃
און דער מלך האָט זײ באַשטימט אַ טאָגטעגלעכע אױסקומעניש פֿון דעם מלכס שפּײַז, און פֿון דעם װײַן װאָס ער טרינקט, און געהײסן זײ דערציען דרײַ יאָר, און צום סָוף פֿון זײ, זאָלן זײ זיך שטעלן פֿאַרן מלך.
Ibn Ezra
[Daniel 1:5] Vayman (וַיְמַן - And the king allotted): This is a transitive verb (po'al yotze - פֹּעַל יוֹצֵא). And the meaning is: to give them portions/allotments (manot - מָנוֹת). And the meaning of pat-bag (פַּת־בַּג) is provisions/food (ma'achal - מַאֲכָל). And it is written in Scripture [using a related root word]: “And I will give you le-vag (כתיב: לְבַג - written form) / le-vaz (קרי: לְבַז - read form, for plunder)” [Ezekiel 25:7 - referring to the K'tiv/K'ri]. And the meaning [of bag and baz] is close. Perhaps the specific meaning of bag [here in Daniel] is cooked meat.
Rashi
of... food Heb. מִפַּת־בַּג. That is the name of the king’s fare in the language of the Chaldeans. Some interpret פַּת־בַּג, [as] bread, but it does not appear correct, for it is written (below verse 16): “The steward would take away פַּת־בָּגָם... and give them pulse.” Now pulse is not a substitute for bread, but a substitute for cooked food.