Is It Permissible to Go Back to Sleep in the Morning?

After Shacharit, if one wants to go to sleep, it depends: if he is tired, of course there is no problem, and it is preferable to be a horse [one who sleeps a lot] for an hour rather than to be a horse all day.

However, if this sleep is merely for idleness, there is a serious problem. Thus the Sages taught in Pirkei Avot (3:10): Rabbi Dosa ben Harkinas says: morning sleep, midday wine, children's chatter, and sitting in the gatherings of ignoramuses take a person out of the world.

And although the main intent is that one should not neglect the recitation of Shema and prayer at their proper time, nevertheless the Rashbatz wrote there: There are things that are good for the body and pleasant to it, yet difficult for the soul to remove itself from its world, and these include morning sleep, which is pleasant to him. And the verse says, The door turns on its hinge, and the lazy man on his bed (Mishlei 26:14). Woe to that pleasure, which draws one away and causes one to neglect prayer and every good deed, and strengthens within him the trait of laziness.

And so they said in Bereshit Rabbah (section 17:5): The beginning of downfall is sleep; when one sleeps, he is not engaged in Torah, and when one sleeps, he is not engaged in good deeds. And the rule in matters like these is that everything depends on the person.

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