(30) باب تَحْرِيمِ الظُّلْمِ وَغَصْبِ الأَرْضِ وَغَيْرِهَا
Abu Huraira (Allah be pleased with him) reported Allah's Messenger (may peace he upon him) as saying:
One should not take a span of land without having legitimate right to it, otherwise Allah would make him wear (around his neck) seven earths on the Day of Resurrection.
Reference: Sahih Muslim 1611
In-book reference: Book 22, Hadith 175
USC-MSA web (English) reference(deprecated numbering scheme): Book 10, Hadith 3924