Tribute, Spoils, and Rulership (Kitab Al-Kharaj, Wal-Fai' Wal-Imarah)
Dawud :: Book 19 : Hadith 3068
Narrated Urwah:
The Prophet (peace_be_upon_him) said: If anyone brings barren land into cultivation, it belong to him. He then transmitted a similar tradition mentioned above (No. 3067).