'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 Yahweh: it shall be a statute forever throughout their generations on the behalf of the children of Israel.

The various articles of clothing shall be on Aaron and on his sons when they enter the Tent of Meeting, or when they approach the altar [of incense] to minister in the Holy Place, so that they do not incur guilt and die. It shall be a statute forever to Aaron and to his descendants after him.

And it shall be Aaron's and his sons' by a statute forever from the children of Israel: for it is a heave offering: and it shall be a heave offering from the children of Israel of the sacrifice of their peace offerings, even their heave offering unto the LORD.

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 descendants throughout their generations."