(5) باب السُّجُودِ فِي { ص }
Narrated Ibn 'Abbas:
A prostration when reciting Sad is not one of those which are divinely commanded, but I have seen Messenger of Allah (ﷺ) prostrate himself. (IT)
Reference (IT): Sunan Abi Dawud 1409 (IT)
In-book reference (IT): Book 7, Hadith 9 (IT)
English translation (IT): Book 7, Hadith 1404 (IT)