Sahih Muslim 1611
Sahih Muslim · Book 22: The Book of Musaqah · The prohibition of wrongdoing, seizing land unlawfully etc
Abu Huraira (Allah be pleased with him) reported Allah's Messenger (may peace he upon him) as saying:
وَحَدَّثَنِي زُهَيْرُ بْنُ حَرْبٍ ، حَدَّثَنَا جَرِيرٌ ، عَنْ سُهَيْلٍ ، عَنْ أَبِيهِ ، عَنْ أَبِي هُرَيْرَةَ ، قَالَ قَالَ رَسُولُ اللَّهِ صلى الله عليه وسلم " لاَ يَأْخُذُ أَحَدٌ شِبْرًا مِنَ الأَرْضِ بِغَيْرِ حَقِّهِ إِلاَّ طَوَّقَهُ اللَّهُ إِلَى سَبْعِ أَرَضِينَ يَوْمَ الْقِيَامَةِ " .
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.