Serve his purpose - Idioms by The Free Dictionary
serve (one's) purpose (redirected from serve his purpose)
serve (one's) purpose
To fit or satisfy someone's requirements; to be useful for or fit to achieve someone's aim, goal, or purpose. Well, it isn't a very pretty car, but it should serve our purpose just fine. Child: "But mom, I want a smartphone!" Mother: "Nonsense, the cell phone you already have serves your purpose just fine."
serve a, his, its, etc. ˈpurpose,
serve the ˈpurpose (of doing something) (British English also serve his, its, etc. ˈturn) be useful for a particular purpose or period of time; be good or useful enough for somebody: It’s not a very good radio, but it serves its purpose. ♢ He used his friends and then abandoned them when they had served their turn.
References in classic literature
"Mr Watson now bespoke the most extravagant supper he could well think of; and though he had contented himself with simple claret before, nothing now but the most precious Burgundy would serve his purpose
He could see nothing that would serve his purpose
; he rummaged about his painting things; somehow he could not find a thing; he was frantic.