Hadith Terminologies
Types and Grades of Sahih (Authentic) Hadith (Based on Their Presence in Hadith Collections)
Agreed Upon (Muttafaq ‘Alayh – by Bukhari and Muslim):
The Hadith found in both Sahih Bukhari and Sahih Muslim is called "Muttafaqun Alayh" (agreed upon) and is considered at the highest level of authenticity.
Narrations Unique to Bukhari:
Any Hadith found in Sahih Bukhari but not found in Sahih Muslim.
Narrations Unique to Muslim:
Any Hadith found in Sahih Muslim but not found in Sahih Bukhari.
Sahih According to Conditions of Both (Bukhari & Muslim):
Any Hadith not found in either Sahih Bukhari or Sahih Muslim, but is authentic according to the conditions of both Imams.
Sahih According to Bukhari’s Conditions:
Any Hadith authentic according to Imam Bukhari’s conditions but not present in Sahih Bukhari.
Sahih According to Muslim’s Conditions:
Any Hadith authentic according to Imam Muslim’s conditions but not present in Sahih Muslim.
Sahih According to Other Than Them:
Any Hadith authentic according to the conditions of other Muhaddithin (Hadith scholars) besides Imam Bukhari and Imam Muslim.