'Perform' in the Bible

but shall minister with their brothers in the Tent of Meeting, to perform the duty, and shall do no service. You shall do thus to the Levites concerning their duties."

"You shall perform the duty of the sanctuary, and the duty of the altar; that there be wrath no more on the children of Israel.

Of the children of Israel's half, you shall take one drawn out of every fifty, of the persons, of the cattle, of the donkeys, and of the flocks, [even] of all the livestock, and give them to the Levites, who perform the duty of the tabernacle of Yahweh."