Mu'awiyah bin Qurrah narrates from a man of the Ansar that the mount of a man in ihram trampled a nest of ostrich eggs. The man went to Ali (may Allah be pleased with him) and asked him about it. Ali (may Allah be pleased with him) said: For every egg you owe the mating of a she-camel, or the foetus of a she-camel. The man went to the Prophet (peace and blessings be upon him) and told him what Ali (may Allah be pleased with him) had said. The Prophet (peace and blessings be upon him) said: "You have heard what Ali (may Allah be pleased with him) said; but come to the concession: for every egg you owe a day's fast or feeding one poor person."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الحج / 10019