In The Name of Allaah, The Most Merciful, The Bestower of Mercy.
Narrated Abu Hurairah [radiyallaahu-anhu]: Allaah’s Messenger [sallal-laahu-alayhi-wasallam] said, “Allaah says, ‘I have nothing to give but Paradise as a reward to my slave- a true believer of Islamic Monotheism, who, if I cause his dear friend amongst the people of the earth to die, remains patience and hopes for Allaah’s reward’”. 
Imaam Abdul-Azeez Bin Baaz [rahimahullaah] said: “Dear friend”; this means his beloved one, brother, father or wife. If he remains patient and hopes for Allaah’s reward, he will receive Paradise. 
Saheeh Al-Bukhaari : hadeeth Number 6423]
 [Al-Hulalul Ibreeziyyah Vol 4. Page: 226. Footnote 4]