וַיַּקְרֵ֣ב מֹשֶׁ֔ה אֶֽת־אַהֲרֹ֖ן וְאֶת־בָּנָ֑יו וַיִּרְחַ֥ץ אֹתָ֖ם בַּמָּֽיִם׃
Entonces Moisés hizo llegar á Aarón y á sus hijos, y lavólos con agua.
Or HaChaim
Furthermore, we may understand what happened in terms of a comment by Torat Kohanim on verse 6: "he washed them in water." They say that the High Priest (and the ordinary priests when required) acquired the merit accompanied by ritual immersion and his washing his hands and feet before each act of service in the Temple on the Day of Atonement. The words זה הדבר אשר צוה ה׳ לעשות, "this is the thing which G'd has commanded to be done," means that these rites were to be performed also in the future, seeing performance of this command granted them the privilege of ritual immersion in the future. [According to ראב׳ד quoted by Malbim the ritual immersion referred to is the the ritual baths the High Priest underwent during the seven days he prepared himself for the Day of Atonement. Ed.]