Exodus 30:20-22

Complete Jewish Bible

²⁰ when they enter the tent of meeting — they are to wash with water, so that they won’t die. Also when they approach the altar to minister by burning an offering for Adonai, ²¹ they are to wash their hands and feet, so that they won’t die. This is to be a perpetual law for them through all their generations.”

²² Adonai said to Moshe,