Sayyiduna Ali (may Allah be pleased with him) said: the Messenger of Allah (peace and blessings be upon him) ordered me to take charge of his sacrificial camels, to give their meat, their hides and their saddle-cloths in charity, and not to give the butcher anything (from them). Then he said: "We will give him (his wage) from what we have."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الحج / 10243