Wearing a Kippa Indoors, and While Sleeping

As we have seen, even if wearing a Kippa cannot be defined as an outright Halachic obligation (except while praying, reciting Berachot, and eating), it is proper to ensure not to walk four Amot (cubits) with one's head uncovered. It is considered a special act of piety to avoid walking even shorter distances without a Kippa. The Maharshal (Rav Shlomo Luria, Poland, 1510-1573), surprisingly, writes that this entire concept applies only outdoors. Indoors, he writes, there is no need to wear a Kippa – even as a measure of piety – because there is a roof over one's head, and this suffices to remind him of G-d. Most later Poskim, however, including the Mishna Berura, disagreed, and maintained that one should wear a Kippa both outdoors and indoors. Is it recommended to wear a Kippa even while sleeping? From the Rambam's comments it appears, at least at first glance, that he assumed people did not wear a head-covering while sleeping. The Rambam ruled that the Birkot Ha'shahar – the series of morning blessings which we recite praising Hashem for certain phenomena we experience each morning – are recited only as we experience each phenomenon. For example, when one hears the crowing of the rooster, he recites "Ha'noten La'sechvi Bina…"; when one opens his eyes, he recites "Poke'ah Ivrim"; when one stands up from his bed, he recites, "Zokef Kefufim"; and so on. Toward the end of this sequential list of blessings, the Rambam mentions that upon putting on one's head-covering, he recites "Oter Yisrael Be'tifara." The Rambam seems to presume that people's heads were uncovered at night, and only in the morning they put on a covering. However, Rav Yisrael Bitan noted that the Rambam may have assumed that people slept with a small covering – like a Kippa – and then recited this Beracha when putting on their turban or larger hat. In any event, the Mishna Berura and others bring the teaching of the Shela (Rav Yeshaya Ha'levi Horowitz, d. 1630) that it is proper to sleep with a head-covering, though it seems clear that this was intended as a special measure of piety, and is not required. As a practical matter, it is very difficult to keep a Kippa on one's head during the night, and oftentimes it becomes difficult to find it in the morning. Certainly, if a man would end up waking up his wife early in the morning as he searches for Kippa, then he should not sleep with a Kippa. Some people avoid this problem by sleeping with a special hat that stays fastened on the head throughout the night. While this is commendable, it is certainly not required. Summary: One should wear a Kippa both indoors and outdoors. Some sources mention that one should sleep with a Kippa as a measure of special piety, though this is not required, especially given the practical difficulty entailed, though there are those who sleep with a cap that remains fastened on the head throughout the night.