Mujaahid (a Follower belonging to the generation succeeding the Companions) narrated that ‘Abdullaah ibn ‘Amr (a Companion) came home and found a sheep was slaughtered by his family. He asked them, “Did you give any to our Jewish neighbor? Did you give any to our Jewish neighbor? For I heard the Prophet of Allah, sallallaahu ‘alayhi wa sallam, say: “[Angel] Gabriel continued to advise me to take good care of neighbors, until thought he would make them to be one of the inheritors.””
Ibn Hajar said: “The word ‘neighbor’ includes both a Muslim and a disbeliever, a righteous or sinful person, a friend or enemy, a stranger or resident, a beneficial or harmful person, a relative or not, and those who are close to one’s home and those who live farther.
A neighbor has different levels (in terms of his rights), the highest being one who has all of the first characteristics (i.e. Muslim, righteous, friendand lower than that is one who has just some of them.
The lowest level is a neighbor who has all of the second characteristics (i.e. disbeliever, sinner, enemy). Every person has rights according to these levels, and some of these characteristics may conflict, so it must be judged which characteristic outweighs another.”