كتاب الافتتاح
11  
The Book of the Commencement of the Prayer
(51)
Chapter: The Prostration in: "When the heaven is split asunder"
(51)
باب السُّجُودِ فِي ‏{‏ إِذَا السَّمَاءُ انْشَقَّتْ ‏}
Sunan an-Nasa'i 962
It was narrated that Abu Hurairah said:
"The Messenger of Allah (ﷺ) prostrated during: 'When the heaven is split asunder.'"
Grade: Sahih (Darussalam)
Reference : Sunan an-Nasa'i 962
In-book reference : Book 11, Hadith 87
English translation : Vol. 2, Book 11, Hadith 963