(25) بَابُ وُجُوبِ وصِلَةِ الرَّحِمِ
Kulayb ibn Manfa'a reported that his grandfather asked, "Messenger ofAllah, towards whom should I be dutiful?" He replied, "Your mother, yourfather, your sister and your brother. Then your mawla (client) has the nextright against you and then your relatives who are connected."
Reference: Al-Adab Al-Mufrad 47
In-book reference: Book 2, Hadith 1
English translation: Book 2, Hadith 47