Exodus 30:20

When they go into the tent of meeting , or when they come near the altar to minister , to burn a food offering to the Lord , they shall wash with water , so that they may not die .

Whenever they enter the tent of meeting, they shall wash with water so that they will not die. Also, when they approach the altar to minister by presenting a food offering to the Lord,

When they go into the tabernacle of the congregation, they shall wash with water, that they die not; or when they come near to the altar to minister, to burn offering made by fire unto the Lord :