"The Messenger of Allah (ﷺ) prohibited that a man sleep on a terrace without something to obstruct him (so that he will not roll off and fall)."
Jami` at-Tirmidhi Book 43, Hadith 129
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Jami` at-Tirmidhi Book 43, Hadith 128 Next Hadith → "The Messenger of Allah (ﷺ) used to take care of us by preaching during the days fearing that we may get bored."

Jami` at-Tirmidhi Book 43, Hadith 130