(4) باب السُّجُودِ فِي { إِذَا السَّمَاءُ انْشَقَّتْ } وَ { اقْرَأْ }
Narrated Abu Rafi':
I offered the night prayer behind Abu Hurairah. He recited Surah Inshiqaq ("When the sky is rent asunder") and prostrated himself. I asked him: What is this prostration ? He replied: I prostrated myself on account of this (surah) behind Abu al-Qasim (i.e. the Prophet). I shall continue prostrating on account of this till I meet him.
Reference: Sunan Abi Dawud 1408
In-book reference: Book 7, Hadith 8
English translation: Book 7, Hadith 1403