Exodus 30:21

they shall wash their hands and feet so that they will not die. This is to be a lasting ordinance for Aaron and his descendants for the generations to come.'

(New International Version)

'So they shall wash their hands and their feet, so that they will not die; and it shall be a perpetual statute for them, for Aaron and his descendants throughout their generations.'

(New American Standard Bible)

So they shall wash their hands and their feet, that they die not: and it shall be a statute for ever to them, even to him and to his seed throughout their generations.

(King James Version)