Exodus 30:20-22

Young's Literal Translation

²⁰ in their going in unto the tent of meeting they wash [with] water, and die not; or in their drawing nigh unto the altar to minister, to perfume a fire-offering to Jehovah,

²¹ then they have washed their hands and their feet, and they die not, and it hath been to them a statute age-during, to him and to his seed to their generations.'

²² And Jehovah speaketh unto Moses, saying,