Tatabbu' 80
Byzantines: 'Abd al-Karim b. Harith never met al-Mustawrid b. Shaddad — broken chain
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.
Muslim reference: Kitab al-fitan (Alamiyya 5170)
Scholarly Critique
Ibn Hajar: Muslim includes second narration with intact isnad in the same chapter; al-Daraqutni's critique is technically valid but tradition is secure.