שִׁבְעַ֣ת יָמִ֗ים יִלְבָּשָׁ֧ם הַכֹּהֵ֛ן תַּחְתָּ֖יו מִבָּנָ֑יו אֲשֶׁ֥ר יָבֹ֛א אֶל־אֹ֥הֶל מוֹעֵ֖ד לְשָׁרֵ֥ת בַּקֹּֽדֶשׁ׃
Семь дней наложит на них сын, священник вместо него, и тот, кто придет в скинию собрания, чтобы служить в святом месте.
Rashi on Exodus
שבעת ימים SEVEN DAYS in succession, on such a High Priest’s installation,
Rashbam on Exodus
ילבשם הכהן, the newly appointed High Priest is to wear them prior to his being inaugurated.
Siftei Chakhamim
[They must be] consecutive. [Rashi knows this] because otherwise, why does it say “seven days”? A Kohein Gadol must wear these garments every time he serves, after which he removes them [until the next time]. Perforce, it refers to his seven days of installation — which are consecutive.