Sihah Sitta are considered the 6 authentic books of hadith. These are the following books in order of authenticity.

• Sahih Bukhari compiled by Muhammad ibn Ismail al Bukhari total Hadith 7563
• Sahih Muslim compiled by Muslim ibn al Hajjaj total Hadith 7275
• Sunan Nasa’i compiled by an-Nasa’i
• Sunan Abu Dawood compiled by Abu Dawood
• Jami at-Tirmidhi compiled by al-Tirmidhi
• Sunan ibn Majah compiled by Ibn Majah

The first two commonly referred to as the Sahihayn.