The neighbor

Worship Allah and associate nothing with Him, and to parents do good, and to relatives, orphans, the needy, the near neighbor, the neighbor farther away, the companion at your side, the traveler, and those whom your right hands possess. Indeed, Allah does not like those who are self-deluding and boastful.

[Qur'aan 4:36]

Narrates Ibn 'Umar:

The Messenger of Allaah (sallallaahu alayhi wa sallam) said, Gabriel kept on recommending me about treating the neighbors in a kind and polite manner, so much so that I thought that he would order (me) to make them (my) heirs."

[Sahih al-Bukhaari Hadith No. 6015]