וְצִפִּיתָ֤ אֹתוֹ֙ זָהָ֣ב טָה֔וֹר מִבַּ֥יִת וּמִח֖וּץ תְּצַפֶּ֑נּוּ וְעָשִׂ֧יתָ עָלָ֛יו זֵ֥ר זָהָ֖ב סָבִֽיב׃
你要用純金把它包裹起來，裡裡外外都要包上金子，又要在它頂上的四周做一圈金冠邊。
Shenei Luchot HaBerit
From the inside and the outside you shall overlay it." This is an allusion to the Torah student whose interior should match his exterior, i.e. he should not pretend to be pious when in truth he is not.