question #3 Sahih al-Bukhari 1369, Book 23, Hadith 121 : What role do angels play in the questioning of a believer in the grave according to Islamic teachings?

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 none
has 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.”