Sayyiduna Abu Sa'id al-Khudri (may Allah be pleased with him) said that the Prophet (peace and blessings be upon him) said: "It is not lawful for anyone to undo the udder-ties of a she-camel to milk her without the permission of her owners, for her owners have set their seal upon her." When Sharik was asked, "Do you narrate it as marfu' (from the Prophet)?" he said, "Yes, I narrate it as marfu'."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الضحايا / 19656