Abu Huraira recited before them:" hen the heaven burst asunder" (al-Qur'an, lxxxiv. 1) and performed prostration. After completing (the prayer) he informed them that the Messenger of Allah ﷺ has prostrated himself at it (this verse). (Using translation from Muslim 578a)   

أَنَّ أَبَا هُرَيْرَةَ قَرَأَ لَهُمْ إِذَا السَّمَاءُ انْشَقَّتْ فَسَجَدَ فِيهَا فَلَمَّا انْصَرَفَ أَخْبَرَهُمْ أَنَّ رَسُولَ اللهِ ﷺ سَجَدَ فِيهَا  

[Machine] I saw Abu Huraira reading when the sky split and he prostrated in it. So I said, "O Abu Huraira, I saw you prostrating." He replied, "If I had not seen the Messenger of Allah ﷺ prostrating, I would not have prostrated."  

رَأَيْتُ أَبَا هُرَيْرَةَ ؓ قَرَأَ إِذَا السَّمَاءُ انْشَقَّتْ فَسَجَدَ فِيهَا فَقُلْتُ يَا أَبَا هُرَيْرَةَ إِنِّي أَرَاكَ سَجَدْتَ فَقَالَ لَوْ لَمْ أَرَ رَسُولَ اللهِ ﷺ سَجَدَ مَا سَجَدْتُ  

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. (Using translation from Abū Dāʾūd 1408)   

صَلَّيْتُ مَعَ أَبِي هُرَيْرَةَ ؓ الْعَتَمَةَ فَقَرَأَ إِذَا السَّمَاءُ انْشَقَّتْ فَسَجَدَ قُلْتُ مَا هَذِهِ السَّجْدَةُ؟ قَالَ سَجَدْتُ بِهَا خَلْفَ أَبِي الْقَاسِمِ ﷺ فَلَا أَزَالُ أَسْجُدُ بِهَا حَتَّى أَلْقَاهُ وَرَوَاهُ الْبُخَارِيُّ فِي الصَّحِيحِ عَنْ مُسَدَّدٍ وَرَوَاهُ مُسْلِمٌ عَنْ عُبَيْدِ اللهِ بْنِ مُعَاذٍ وَغَيْرِهِ عَنْ مُعْتَمِرٍ  

[Machine] And he said, "I saw my beloved, ﷺ , prostrating in it, and I continued to prostrate in it until I met him. 3721 Abu Salih bin Abi Taahir informed us that my grandfather Yahya bin Mansur narrated to us, Ahmad bin Salamah narrated to us, Muhammad bin Bishar Al-Abdi narrated to us, Muhammad bin Ja'far narrated to us, Shu'bah mentioned it to him in a similar way except that he said it from Abu Rafi, who said, "I saw Abu Hurayrah prostrating when the sky split open. I asked him, 'Do you prostrate in it?' So he mentioned it, and at the end Shu'bah said, "I said, 'The Prophet, ﷺ , said yes.'"  

وَقَالَ رَأَيْتُ خَلِيلِي ﷺ يَسْجُدُ فِيهَا فَلَا أَزَالُ أَسْجُدُ فِيهَا حَتَّى أَلْقَاهُ 3721 أَخْبَرَنَا أَبُو صَالِحِ بْنُ أَبِي طَاهِرٍ أنبأ جَدِّي يَحْيَى بْنُ مَنْصُورٍ ثنا أَحْمَدُ بْنُ سَلَمَةَ ثنا مُحَمَّدُ بْنُ بَشَّارٍ الْعَبْدِيُّ ثنا مُحَمَّدُ بْنُ جَعْفَرٍ ثنا شُعْبَةُ فَذَكَرَهُ بِنَحْوِهِ إِلَّا أَنَّهُ قَالَ عَنْ أَبِي رَافِعٍ قَالَ رَأَيْتُ أَبَا هُرَيْرَةَ ؓ يَسْجُدُ فِي إِذَا السَّمَاءُ انْشَقَّتْ قُلْتُ تَسْجُدُ فِيهَا فَذَكَرَهُ وَفِي آخِرِهِ وَقَالَ شُعْبَةُ قُلْتُ النَّبِيُّ ﷺ قَالَ نَعَمْ  

[Machine] I saw Ammar ibn Yasir recite: "When the heavens split apart and descended, and prostrated to it."  

رَأَيْتُ عَمَّارَ بْنَ يَاسِرٍ قَرَأَ إِذَا السَّمَاءُ انْشَقَّتْ عَلَى الْمِنْبَرِ فَنَزَلَ فَسَجَدَهَا