'Serve' in the Bible

They shall also take care of all the furnishings and utensils of the Tent of Meeting, and [attend to] the duties of the Israelites, doing the service of the tabernacle.

but at the age of fifty years, they shall retire from the service of the [tabernacle] work and serve no longer.

Then Moses said, “Please do not leave us, for you know how we are to camp in the wilderness, and you will serve as eyes for us [as we make our trek through the desert].

Therefore you and your sons with you shall attend to your priesthood for everything concerning the altar [of burnt offering and the altar of incense] and [of the Holy of Holies] within the veil, and you are to serve. I am giving you the priesthood as a bestowed service, but the stranger (outsider, layman) who approaches shall be put to death.”

“Behold, I have given the Levites all the tithe in Israel as an inheritance, in return for their service which they perform, the service of the Tent of Meeting (tabernacle).