Ata al-Khurasani says that Sayyiduna Umar, Uthman, Ali bin Abi Talib, Zayd bin Thabit, Ibn Abbas and Mu'awiyah (may Allah be pleased with them) all held that for an ostrich killed by a muhrim, the sacrifice of a camel is due.
Al-Shafi'i (may Allah have mercy on him) said: This is not established according to the scholars of hadith. However, it is the view of most of those I have met, so on the basis of their view and of analogy we say that for an ostrich a camel is due, not on the basis of this (report).
The Shaykh (al-Bayhaqi) said: The reason for its weakness is that it is mursal, for Ata al-Khurasani was born in the year 50 and did not meet Umar, Uthman, Ali or Zayd, and he was a child in the time of Mu'awiyah. His hearing from Ibn Abbas is not established, although it is possible that he heard from him, since Ibn Abbas died in the year 68. Moreover, besides the break in his narration from those we have named, Ata al-Khurasani is among those whom the scholars of hadith have criticised. And Allah knows best.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الحج / 9868
Hadith Gradingمحدثین:ضعيف
Hadith Takhrij«ضعيف۔ اخرجه الشافعي في الام 2/ 293»