Sahih al-Bukhari 768
Sahih al-Bukhari · Book 10: Call to Prayers (Adhaan) · To recite in the 'Isha prayer, with As-Sajda(prostration)
Narrated Abu Rafi`:
حَدَّثَنَا مُسَدَّدٌ ، قَالَ حَدَّثَنَا يَزِيدُ بْنُ زُرَيْعٍ ، قَالَ حَدَّثَنِي التَّيْمِيُّ ، عَنْ بَكْرٍ ، عَنْ أَبِي رَافِعٍ ، قَالَ صَلَّيْتُ مَعَ أَبِي هُرَيْرَةَ الْعَتَمَةَ فَقَرَأَ {إِذَا السَّمَاءُ انْشَقَّتْ} فَسَجَدَ فَقُلْتُ مَا هَذِهِ قَالَ سَجَدْتُ بِهَا خَلْفَ أَبِي الْقَاسِمِ صلى الله عليه وسلم فَلاَ أَزَالُ أَسْجُدُ بِهَا حَتَّى أَلْقَاهُ.
Once I prayed the `Isha' prayer with Abu Huraira and he recited, "Idha s-samaa'u n-shaqqat" (84) and prostrated. I said, "What is that?" He said, "I prostrated behind Abul-Qasim, (the Prophet) (when he recited that Sura) and I will go on doing it till I meet him."