He, sallallaahu ‘alayhi wa sallam, made honoring the neighbor one of the signs of faith:

Ibn Rajab Al-Hanbali (a scholar) said: “’Ataa’ Al-Khurasaani the narrator of this narration was asked about the right of the neighbor over his neighbor. He replied: “If he seeks your help, help him. If he asks to borrow money, loan it. If he becomes poor then give him. If he becomes sick then visit him. If something good happens, congratulate him. If calamity strikes, then console him. If he dies, then attend his funeral.”

Ibn Hajar (a scholar) said: “Protecting the rights of the neighbor is from the perfection of faith, and even the people before Islam used to pay attention to it. It is achieved by being good to one’s neighbor by whatever means possible, such as giving gifts, greeting them, smiling at them, asking about them, helping them when they need assistance, and keeping all kinds of harm from him.”