Separation in beds is a general ruling that includes everyone
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The saying of the Messenger (peace and blessings be upon him): (And separate them in their beds), Is this hadith a general one that covers all people, for example: brothers in Allah who are not related by blood, or a son and his father, and so on?
Yes,Meaning: Between boys and girls, between the girls themselves, and between the boys themselves, they are to be separated in their beds; because harm is feared once they reach ten years of age.
The questioner: And is it permissible for adults over the age of twenty to sleep under one blanket and on one bed?The Shaykh: Adults who are over the age of twenty should not be on the same bed; it is very dangerous for them, for a sleeping person may not be aware of anything.
The questioner: What is reported about Zayd ibn Harithah and Usamah (may Allah be pleased with them both) that they slept under one blanket?The Shaykh: But were they sleeping? Perhaps they were just lying down and had not fallen asleep.
Yes,Meaning: Between boys and girls, between the girls themselves, and between the boys themselves, they are to be separated in their beds; because harm is feared once they reach ten years of age.
The questioner: And is it permissible for adults over the age of twenty to sleep under one blanket and on one bed?The Shaykh: Adults who are over the age of twenty should not be on the same bed; it is very dangerous for them, for a sleeping person may not be aware of anything.
The questioner: What is reported about Zayd ibn Harithah and Usamah (may Allah be pleased with them both) that they slept under one blanket?The Shaykh: But were they sleeping? Perhaps they were just lying down and had not fallen asleep.