Sahih Muslim
The Book of Transactions (Kitab Al-Buyu)
Book Number: 010 / Hadith Number: 3920
Sa'id b. Zaid b. 'Amr b. Nufail (Allah be pleased with them) reported Allah's Messenger (may peace be upon him) as saying: He who wrongly took a span of land, Allah shall make him carry around his neck seven earths.