Malik related to me that he heard Ibn Shihab say, "The straycamels in the time of Umar ibn al-Khattab were numerous and leftalone. No one touched them until the time of Uthman ibn Affan. Heordered that they be publicised and then sold, and if the owner cameafterwards, he was given their price."
USC-MSA web (English) reference: Book 36, Hadith 51
Arabic reference: Book 36, Hadith 1454