'Perpetual' in the Bible

""This day is to be a memorial for you, and you are to celebrate it as a festival to the LORD. You are to celebrate it as a perpetual ordinance from generation to generation.

""You are to observe the Festival of Unleavened Bread, since on this very day I brought your tribal divisions from the land of Egypt. You are to observe this day from generation to generation as a perpetual ordinance.

You are to observe this event as a perpetual ordinance for you and your children forever.

In the Tent of Meeting, outside the curtain that is before the Testimony, Aaron and his sons are to maintain the lamp stand from evening until morning in the LORD's presence. It is to be a perpetual ordinance from generation to generation among the Israelis."

They shall be on Aaron and his sons when they enter the Tent of Meeting or when they approach the altar to minister in the Holy Place so they don't incur guilt and die. This is to be a perpetual ordinance for him and for his descendants after him."

You are to gird Aaron and his sons with sashes and tie headdresses on them. The priesthood is to belong to them by perpetual ordinance, and you are to ordain Aaron and his sons.

These offerings from the Israelis are to be a perpetual ordinance for Aaron and his sons. They are presented offerings, and they are to be presented offerings from the Israelis out of their peace offerings. They are presented offerings to the LORD.

They are to wash their hands and their feet so that they don't die, and it is to be for them a perpetual ordinance for Aaron and his seed from generation to generation."

The Israelis are to keep the Sabbath to make the Sabbath observance a perpetual covenant from generation to generation.

You are to anoint them just as you anointed their father so they may serve me as priests. Their anointing is to qualify them to belong to a perpetual priesthood from generation to generation."