Sunan an-Nasa'i is one of the six major collections of Hadith in Sunni Islam. Compiled by the Islamic scholar Abu Abdur Rahman an-Nasa'i in the 9th century, it contains thousands of sayings and actions of the Prophet Muhammad. The collection is known for its rigorous criteria in selecting authentic narrations. The work is divided into several books, each focusing on different aspects of Islamic law and practice. Sunan an-Nasa'i is highly regarded for its organization and clarity, making it a valuable resource for scholars and students of Islamic jurisprudence.