Abu Hurairah reported,
Abu Bakr and Umar 
both prostrated during the recitation of "When the sky is split asunder," as did one who is better than them both.
Nasai 966
Sahihأخبرنا عمرو بن علي قال حدثنا يحيى قال حدثنا قرة بن خالد عن محمد بن سيرين
عن أبي هريرة قال
سجد أبو بكر وعمر رضي الله عنهما في إذا السماء انشقت ومن هو خير منهما
النسائي 966صحيح
Contents
Reference
Commentary
Ayat
Collection
Sunan Nasai Sughra
Book
Commencement
Chapter
Sujud in "Read in the name of your Lord"
Numbering
Darussalam 966
Details
Collection
Sunan Nasai Sughra
Book
Commencement
Chapter
Sujud in "Read in the name of your Lord"
Numbering
Darussalam 966
Ayat
No annotations are available.
Reference
Nasai967
Commentary
Darussalam
[Its isnad is sahih] Ahmad reported it (2/281), and Abdul-Razzaq in Musannaf (3/340, no. 5886), from the hadith of Muhammad bin Sirin through this chain, and it is also in Kubra, no. 1037.Yahya is Ibn Saeed Qattan, and his student is Fallas.