Imam Sadiq (peace be upon him) had sent his servant out to perform a task for him. When a long time had passed and he had not returned, the Imam (peace be upon him) set out in search for him. After searching for a while, the Imam (peace be upon him) found him asleep.
Without the slightest exhibition of anger, the Imam (peace be upon him) sat down near his head and began to fan him till he woke up from his sleep. After he had woken up, he (peace be upon him) said to him: By God! It does not befit you that you sleep during the night as well as during the day. You ought to sleep during the night, but work for us during the day.( Muntahal Aa’maal, vol. 2, pg.130. )