Which is the poem in which God completes the task for a tired clergy?

-the poem goes about a devout clergyman who never fails his duty. one night when he returns home he is dead tired and wants to rest. but just when he prepares to take a nap someone requests him to visit a house to help a sick/dying person. The clergyman does his best to dress up and leave but dozes off in his chair instead. When he wakes up he realizes that he has failed his duty. He is penitent and so apologizes to God. But God says that it is okay and He had gone instead of him to complete his taskPinochio