'Attending' in the Bible

And, day by day, attending constantly in the Temple with one accord, and breaking bread in private houses, they took their meals with great happiness and single-heartedness,

For for this cause pay ye tribute also: for they are God's ministers, attending continually upon this very thing.

Do you not know that those performing the holy services eat the things from the temple, [and] those attending to the altar have a share with the altar?