وَحَدَّثَنِي مَالِكٌ، أَنَّهُ سَمِعَ ابْنَ شِهَابٍ، يَقُولُ كَانَتْ ضَوَالُّ الإِبِلِ فِي زَمَانِ عُمَرَ بْنِ الْخَطَّابِ إِبِلاً مُؤَبَّلَةً تَنَاتَجُ لاَ يَمَسُّهَا أَحَدٌ حَتَّى إِذَا كَانَ زَمَانُ عُثْمَانَ بْنِ عَفَّانَ أَمَرَ بِتَعْرِيفِهَا ثُمَّ تُبَاعُ فَإِذَا جَاءَ صَاحِبُهَا أُعْطِيَ ثَمَنَهَا ‏.‏

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." Translation Not Available

Book Ref: Muwatta Imam Malik Book 36 Hadith 1454
Web Ref:  Muwatta Imam Malik Book 36 Hadith 51