Tatabbu' 69
Heaven and Hell: addition of 'he [the Prophet] separated them' by Sufyan b. Uyayna
Hadith Text
This is a Tatabbu' entry -- a cross-collection scholarly follow-up.
Tatabbu' (literally "the follow-up") is the short name for Kitab al-Ilzamat wa al-Tatabbu', a 10th-century work by the hadith scholar al-Daraqutni reviewing specific narrations in Sahih al-Bukhari and Sahih Muslim. The number in the reference points to that catalog's entry -- not a hadith number on this site -- so a direct hadith link is not always available.
Bukhari reference: Kitab bad' al-khalq / Kitab al-riqaq (Alamiyya 3083, 6007)
Scholarly Critique
Ibn Hajar: al-Bukhari includes a second narration without the addition, so criticism does not undermine the tradition. Al-Nawawi: accepts additions by reliable transmitters categorically.