'Perpetual Statute' in the Bible

You shall dress them with belts, Aaron and his sons, and bind headbands on them: and they shall have the priesthood by a perpetual statute: and you shall consecrate Aaron and his sons.

"'It shall be a perpetual statute throughout your generations in all your dwellings, that you shall eat neither fat nor blood.'"

It shall be for Aaron and his sons; and they shall eat it in a holy place: for it is most holy to him of the offerings of the LORD made by fire by a perpetual statute."

It shall be a perpetual statute to them: and he who sprinkles the water for impurity shall wash his clothes, and he who touches the water for impurity shall be unclean until evening.