'Perform' in the Bible

On the fourteenth day of this month {at twilight} you will perform it at its appointed time according to all its decrees; and according to all its stipulations you will observe it."

And it happened, men who were unclean {by a dead person} were not able to perform the Passover on that day. And they came {before} Moses and Aaron on that day.

Look, I myself have chosen your brothers the Levites from the midst of the children. They are a gift to you given from Yahweh to perform the work of the tent of assembly.

But you with your sons will keep your priesthood to perform your priestly duties for everything at the altar and for {the area behind the curtain}. I give you the priesthood as a gift, but the stranger who approaches will be put to death."

The Levites will perform the service of the tent of assembly, and they will bear their guilt, an eternal decree for all your generations. But they will not receive an inheritance in the midst of the {Israelites}