Sunan an Nasai
961
Sahih+2

It was narrated from Abu Salamah bin Abdur- Rahman that:Abu Hurairah (led them in prayer and) recited: "When the heaven is split asunder." and prostrated during it. When he had finished praying, he told them that the Messenger of Allah (ﷺ) had prostrated during it

SahihAbu Ghuddah
SahihAl-Albani