It is narrated from Sayyiduna Abdullah bin Amr (may Allah be pleased with them both) that the Messenger of Allah (peace and blessings be upon him) said: "The best of companions in the sight of Allah is the one who is best to his companion, and the best of neighbours in the sight of Allah is the one who is best to his neighbour."
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 13638