From Sahih Bukhari (Hadith 6981):
Narrated `Amr bin Ash-Sharid:Abu Rafi` sold a house to Sa`d bin Malik for four-hundred Mithqal of gold, and said, "If I had not heard the Prophet (ﷺ) saying, 'The neighbor has more right to be taken care of by his neighbor (than anyone else),' then I would not have sold it to you
Reference: Bukhari 6981