וְרָחֲצ֛וּ יְדֵיהֶ֥ם וְרַגְלֵיהֶ֖ם וְלֹ֣א יָמֻ֑תוּ וְהָיְתָ֨ה לָהֶ֧ם חָק־עוֹלָ֛ם ל֥וֹ וּלְזַרְע֖וֹ לְדֹרֹתָֽם׃ (פ)
At maghuhugas sila ng kanilang mga kamay at ng kanilang mga paa upang hindi sila mamatay; at ito ay magiging palagiang tuntunin para sa kanila, para sa kanya at sa kanyang lahi sa buong salinlahi nila.
Rashi
ולא ימתו THAT THEY DIE NOT — This statement is intended to declare subject to the death penalty anyone who ministers at the outer altar without having washed his hands and his feet, because from the first mention of “death” (v. 20) we can only infer that one is subject to death for entering the Sanctuary under these circumstances.
Chizkuni
ורחצו ידיהם, ‘they are to wash their hands;” this has also been repeated to stress that this was a law for all future generations.
Ibn Ezra
ורחצו (And they shall wash) - He reiterated and mentioned it another time [he had already written so in verse 19], to instruct that they should do so always [for future generations]. Or, he mentioned this [to add a punishment to the warning, to indicate] that if they do not do so, they are liable to death [as it is stated 'and they shall not die'; and so Rashi explains].