The first two, commonly referred to as the Two Sahihs as an indication of their authenticity, contain approximately seven thousand hadiths altogether if repetitions are not counted, according to Ibn Hajar. 273 AH, 887 CE), includes 4,341 ahadith (including repetitions)
- Sunan ibn Majah, collected by Ibn Majah (d.
- 279 AH, 892 CE), includes 4,400 ahadith (including repetitions, only 83 are repeated)
Jami al-Tirmidhi, collected by al-Tirmidhi (d.275 AH, 888 CE), includes 5,274 ahadith (including repetitions) Sunan Abu Dawood, collected by Abu Dawood (d.303 AH, 915 CE), includes 5,270 ahadith (including repetitions) Sunan al-Sughra, collected by al-Nasa'i (d.
261 AH, 875 CE), includes 7,500 ahadith (including repetitions, around 3,033 without repetitions) 256 AH, 870 CE), includes α 7,563 ahadith (including repetitions, around 2,600 without repetitions)
- Sahih Bukhari, collected by Imam Bukhari (d.
- Sunni Muslims view the six major hadith collections as their most important, though the order of authenticity varies between Madhhabs: The reason for the addition of Ibn Majah's Sunan is that it contains many Hadiths which do not figure in the other five, whereas all the Hadiths in the Muwatta' figure in the other Sahih books. In particular, the Malikis and Ibn al-Athir consider al-Muwatta' to be the sixth book. Not all Sunni Muslim jurisprudence scholars agree on the addition of Ibn Majah. Since then, they have enjoyed near-universal acceptance as part of the official canon of Sunni Islam. They were first formally grouped and defined by Ibn al-Qaisarani in the 11th century, who added Sunan ibn Majah to the list. They are sometimes referred to as al-Sihah al-Sittah, which translates as "The Authentic Six". The Kutub al-Sittah ( Arabic: ٱلْكُتُب ٱلسِّتَّة, romanized: al-Kutub as-Sittah, lit.'the six books') are six (originally five) books containing collections of hadith (sayings or acts of the Islamic prophet Muhammad) compiled by six Sunni Muslim scholars in the ninth century CE, approximately two centuries after the death of Muhammad.