Exodus 30:19-21

New American Standard Bible

¹⁹ Aaron and his sons shall ^(A)wash their hands and their feet from it; ²⁰ when they enter the tent of meeting, they shall wash with water, so that they do not die; or when they approach the altar to minister, by offering up in smoke a fire sacrifice to the Lord. ²¹ So they shall wash their hands and their feet, so that they do not die; and ^(B)it shall be a permanent statute for them, for ^[a]Aaron and his ^[b]descendants throughout their generations.”