The upper crust/ the choicest and best/ tip-top/ superfine
By metaphor: the upper class; the qualitative part of the public; the chosen ones in society (originally: the choicest flour and oil).
("And he shall bring it to Aaron's sons the priests, and he shall take from there a handful of its fine flour and of its oil, with all its frankincense" - Leviticus 2:2, laws of sacrifices)
Translation
Expression (Hebrew)
סָולְתָּהּ וְשַׁמְנָהּ
Definition (Hebrew)
בְּהַשְׁאָלָה: הַחֶבְרָה הַגְּבוֹהָה. הַחֵלֶק הָאֵיכוּתִי שֶׁל הַצִּבּוּר.הַמֻּבְחָרִים שֶׁבַּצִּבּוּר (בַּמָּקוֹר: הַסֹּלֶת וְהַשֶּׁמֶן הַמֻּבְחָרִים).
("וֶהֱבִיאָהּ אֶל בְּנֵי אַהֲרֹן הַכֹּהֲנִים וְקָמַץ מִשָּׁם מְלֹא קֻמְצוֹ מִסָּלְתָּהּ וּמִשַּׁמְנָהּ עַל כָּל לְבֹנָתָהּ"- וַיִּקְרָא ב ב, דִּינֵי קָרְבָּנוֹת)