Sahi Muslim (Arabic: صحيح مسلم‎) is one of the Kutub al-Sittah (six major hadith collections) in Sunni Islam. It is of high importance among Sunni muslims and considered the second most authentic hadith collection after Sahi al-Bukhari. It was collected by Muslim ibn al-Hajjaj (815-875), also known as Imam Muslim. Sahih Muslim, together with Sahih al-Bukhari is termed as "Sahihayn".