Sunan An-Nasai (4 Vol. set)
Sunan An-Nasai has the fewest weak ahadith after the two Sahih collections. This Sunan is one of the six is al-Mujtaba or as-Sunan as-Sughara, which is a synopsis of a large collection of ahadith which he considered to be fairly reliable. In the smaller collection, only those ahadith which he considered to be reliable have been included.