From Sahih Bukhari (Hadith 3195):
Narrated Muhammad bin Ibrahim bin Al-Harith:from Abu Salama bin `Abdur-Rahman who had a dispute with some people on a piece of land, and so he went to `Aisha and told her about it. She said, "O Abu Salama, avoid the land, for Allah's Messenger (ﷺ) said, 'Any person who takes even a span of land unjustly, his neck shall be encircled with it down seven earths
Reference: Bukhari 3195