'Statute Forever' in the Bible

in the tent of meeting, outside the veil which is before the testimony. Aaron and his sons shall keep it in order from evening to morning before LORD. It shall be a statute forever throughout their generations on the behalf of the

And they shall be upon Aaron, and upon his sons, when they go in to the tent of meeting, or when they come near to the altar to minister in the holy place, that they not bear iniquity, and die. It shall be a statute forever to him

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