(51) باب السُّجُودِ فِي { إِذَا السَّمَاءُ انْشَقَّتْ }
It was narrated that Abu Hurairah said:
"Abu Bakr and Umar prostrated during: 'When the heaven is split asunder,' as did the one who was better than them (the Prophet (ﷺ)). " (JA)
Reference (JA): Sunan an-Nasa'i 965 (JA)
In-book reference (JA): Book 11, Hadith 90 (JA)
English translation (JA): Vol. 2, Book 11, Hadith 966 (JA)