מִצְוַת עֲשֵׂה לְקַדֵּשׁ כֹּהֵן הָעוֹבֵד יָדָיו וְרַגְלָיו וְאַחַר כָּךְ יַעֲבֹד שֶׁנֶּאֱמַר (שמות ל יט) "וְרָחֲצוּ אַהֲרֹן וּבָנָיו מִמֶּנּוּ אֶת יְדֵיהֶם וְאֶת רַגְלֵיהֶם". וְכֹהֵן שֶׁעָבַד וְלֹא קִדֵּשׁ יָדָיו וְרַגְלָיו שַׁחֲרִית חַיָּב מִיתָה בִּידֵי שָׁמַיִם שֶׁנֶּאֱמַר (שמות ל כ) "יִרְחֲצוּ מַיִם וְלֹא יָמֻתוּ". וַעֲבוֹדָתוֹ פְּסוּלָה בֵּין כֹּהֵן גָּדוֹל בֵּין כֹּהֵן הֶדְיוֹט:
It is a positive commandment for the serving priest to sanctify his hands and legs, and [only] then should he serve, as it says (Exodus 30:19) "And Aaron and his sons washed their hands and legs." And the priest who served in the morning without sanctifying his hands and legs is liable for death by Heaven, as it says (Exodus 30:20) "They shall wash with water and shall not die." And his service is invalid, whether he is the High Priest or a regular priest.
