وَمن فَضَائِل نوم اللَّيْل أَنه تَامّ مُسْتَمر غرق على أَن مُعْتَاد النّوم بِالنَّهَارِ لَا يجب أَن يهجره دفْعَة بِغَيْر تدريج. وَأما أفضل هيئات النّوم فَأن يبتدىء على الْيَمين ثمَّ يَنْقَلِب على الْيَسَار طِبًّا وَشرعا
Among the good qualities of sleeping by night are that it should be continuous and deep. If a person is accustomed to sleep during the day, he should not suddenly discard this custom, but do so gradually. Posture in sleep. The best way to sleep is to begin on the right side, and then turn round to the left