وَحَدَّثَنِي مَالِكٌ، عَنِ ابْنِ شِهَابٍ، عَنْ سَالِمِ بْنِ عَبْدِ اللَّهِ، عَنْ أَبِيهِ، أَنَّ عُمَرَ بْنَ الْخَطَّابِ، قَالَ مَنْ أَحْيَا أَرْضًا مَيِّتَةً فَهِيَ لَهُ ‏.‏ قَالَ مَالِكٌ وَعَلَى ذَلِكَ الأَمْرُ عِنْدَنَا ‏.‏

Malik related to me from Ibn Shihab from Salim ibn Abdullah fromhis father that Umar ibn al-Khattab said, "Whoever revives dead land,it belongs to him." Malik said, "That is what is done in ourcommunity." Translation Not Available

Book Ref: Muwatta Imam Malik Book 36 Hadith 1431
Web Ref:  Muwatta Imam Malik Book 36 Hadith 27