After the coronation, one day, Sita and the three brothers of Rama met and planned to exclude Hanuman from the seva of Rama and wanted that all the various services for Rama should be divided only among themselves. They felt that Hanuman had enough chances already. So, they drew up a fist, as exhaustive as they could remember, of the services from dawn till dusk, down to the smallest minutiae and assigned each item to one among themselves. They presented the list of items and assignees to the Lord, while Hanuman was present. Rama heard about the new procedure, read the list and gave His approval, with a smile. He told Hanuman that all the tasks had been assigned to others and the he could now take rest. Hanuman prayed that the list might be read and when it was done, he noticed a task of 'snapping fingers when one yawns'. Of course, being an emperor, Rama should not be allowed to do it himself. It has to be done by a servant, he pleaded. Rama agreed to allot that task to Hanuman.
It was a great piece of good luck for Hanuman, for it entailed Hanuman's constant attendance on his Master, for how could anyone predict when the yawn would come? And, he had to be ready with a snap, as soon as the yawn was on! He could not be away for a minute nor could he relax for a moment. You must be happy that the seva of the Lord keeps you .