SEV Biblia, Chapter 30:21
también se lavarán las manos y los pies, para que no mueran. Y lo tendrán por estatuto perpetuo él y su simiente por sus generaciones.
Clarke's Bible Commentary - Exodus 30:21
Verse 21. And it shall be a statute for ever] To continue, in its literal meaning, as long as the Jewish economy lasted, and, in its spiritual meaning, to the end of time. What an important lesson does this teach the ministers of the Gospel of Christ! Each time they minister in public, whether in dispensing the WORD or the SACRAMENTS, they should take heed that they have a fresh application of the grace and spirit of Christ, to do away past transgressions or unfaithfulness, and to enable them to minister with the greater effect, as being in the Divine favour, and consequently entitled to expect all the necessary assistances of the Divine unction, to make their ministrations spirit and life to the people. See note on "chap. xxix. 20".
Matthew Henry Commentary
Verses 17-21 - A large vessel of brass, holding water, was to be set near the door of the tabernacle. Aaron and his sons must wash their hands and feet a this laver, every time they went in to minister. This was to teach the purity in all their services, and to dread the pollution of sin. The must not only wash and be made clean, when first made priests, but mus wash and be kept clean, whenever they went to minister. It teaches u daily to attend upon God, daily to renew our repentance for sin, an our looking to the blood of Christ for remission; for in many things we daily offend.
Original Hebrew
ורחצו 7364 ידיהם 3027 ורגליהם 7272 ולא 3808 ימתו 4191 והיתה 1961 להם חק 2706 עולם 5769 לו ולזרעו 2233 לדרתם׃ 1755