Sahih al-Bukhari
Sahih al-Bukhari 1074
حَدَّثَنَا مُسْلِمٌ، وَمُعَاذُ بْنُ فَضَالَةَ، قَالاَ أَخْبَرَنَا هِشَامٌ، عَنْ يَحْيَى، عَنْ أَبِي سَلَمَةَ، قَالَ رَأَيْتُ أَبَا هُرَيْرَةَ ـ رضى الله عنه ـ قَرَأَ {إِذَا السَّمَاءُ انْشَقَّتْ} فَسَجَدَ بِهَا فَقُلْتُ يَا أَبَا هُرَيْرَةَ، أَلَمْ أَرَكَ تَسْجُدُ قَالَ لَوْ لَمْ أَرَ النَّبِيَّ صلى الله عليه وسلم يَسْجُدُ لَمْ أَسْجُدْ.
Muslim and Mu‘adh ibn Fadalah narrated to us; they said: Hisham informed us, from Yahya, from Abu Salamah, who said: I saw Abu Hurayrah (may Allah be pleased with him) recite ‘When the sky is split open,’ and he prostrated during it. I said to Abu Hurayrah: ‘Did I not see you prostrating?’ He said: ‘Had I not seen the Prophet (peace and blessings be upon him) prostrate, I would not have prostrated.’