'Lasting' in the Bible

This day will become a memorial for you, and you will celebrate it as a festival to the Lord -- you will celebrate it perpetually as a lasting ordinance.

So you will keep the Feast of Unleavened Bread, because on this very day I brought your regiments out from the land of Egypt, and so you must keep this day perpetually as a lasting ordinance.

In the tent of meeting outside the curtain that is before the testimony, Aaron and his sons are to arrange it from evening to morning before the Lord. This is to be a lasting ordinance among the Israelites for generations to come.