Exodus 29:4
And Aaron and his sons thou shalt bring unto the door of the tabernacle of the congregation, and shalt wash them with water. And Aaron and his sons thou shalt bring unto the door of the tabernacle of the congregation, and shalt wash them with water.
Exodus 29:4 stands among the instructions that set forth God's covenant with those He seeks to save. Those same instructions set forth the terms of salvation. They also provide the education of greatest value.