Messenger of Allah! to whom should I show kindness? He said: Your mother, your sister, your brother and the slave whom you set free and who is your relative, a due binding (on you), and a tie of relationship which should be joined. (Using translation from Abū Dāʾūd 5140)
"أُمَّكَ وأَباك ، وأُختَك وأَخاك، ومولاك الذي يلي ذلك. حقٌّ واجبٌّ ورحمٌّ موصولة".