וַיֹּ֣אמֶר הַמֶּ֔לֶךְ לְאַשְׁפְּנַ֖ז רַ֣ב סָרִיסָ֑יו לְהָבִ֞יא מִבְּנֵ֧י יִשְׂרָאֵ֛ל וּמִזֶּ֥רַע הַמְּלוּכָ֖ה וּמִן־הַֽפַּרְתְּמִֽים׃
And the king spoke unto Ashpenaz his chief officer, that he should bring in certain of the children of Israel, and of the seed royal, and of the nobles,
Read halakhic rulings (Jewish law) on Daniel 1:3: and classical halakhic sources.