(86) باب مَا جَاءَ فِي عَذَابِ الْقَبْرِ
Narrated Al-Bara' bin 'Azib :
The Prophet (p.b.u.h) said, "When a faithful believer is made to sit in his grave, then (the angels) come to him and he testifies that nonehas the right to be worshipped but Allah and Muhammad is Allah's Apostle. And that corresponds to Allah's statement: Allah will keep firm those who believe with the word that stands firm . . . (14.27). Narrated Shu'ba:Same as above and added, "Allah will keep firm those who believe . . .(14.27) was revealed concerning the punishment of the grave."
Reference: Sahih al-Bukhari 1369
In-book reference: Book 23, Hadith 122
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 2, Book 23, Hadith 450