Imam al-Rabi' (may Allah have mercy on him) said: I asked Imam al-Shafi'i (may Allah have mercy on him): Do you narrate any report with a high (short) chain on this matter? He said: "Nothing whose like is established." I said: What is the report? He said: "A trustworthy narrator informed me from Abu al-Zinad that the Prophet (peace and blessings be upon him) said: 'For an ostrich egg that a person in ihram breaks, its value is due.'" I said: This report has also been narrated mawsulan (with a connected chain), but there is disagreement about it (its chain).
Ibn Jurayj (may Allah have mercy on him) said: The best I have heard about ostrich eggs is the hadith of Abu al-Zinad, from al-A'raj, from Sayyiduna Abu Hurayrah (may Allah be pleased with him), that the Messenger of Allah (peace and blessings be upon him) said: "For every egg, a day's fast or feeding one poor person."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الحج / 10017