Verb hypēreteō (to serve) in the Gospels-Acts

(Translation from NRSV with a few modifications for a more literal meaning)

Acts

13: 36For David, after he had served (hypēreteō) the purpose of God in his own generation, died, was laid beside his ancestors, and experienced corruption;
20: 34You know for yourselves that I worked with my own hands to serve (hypēreteō) myself and my companions.
24: 23Then he ordered the centurion to keep him in custody, but to let him have some liberty and not to prevent any of his friends from serving (hypēreteō) him.